Perfecting the basic socialist economic system is the institutional guarantee for high-quality economic development and the construction of a modern and powerful country. Standing at a new historical starting point, we should adhere to and improve the socialist basic economic system and promote high-quality economic development in accordance with the requirements put forward by the Fourth Plenary Session of the 19th CPC Central Committee, closely focus on the goal of high-quality development, firmly grasp the important key point of adhering to and improving the socialist basic economic system, and vigorously promote China’s economy to achieve high-quality development.

　　The socialist basic economic system is a great creation of the party and the people and an institutional guarantee for high-quality development.

　　The Fourth Plenary Session of the 19th CPC Central Committee took "public ownership as the main body, multiple ownership economies developing together, distribution according to work as the main body, multiple modes of distribution coexisting, and socialist market economic system" as Socialism with Chinese characteristics’s basic economic system, which is the latest summary and development of China’s socialist basic economic system, a major institutional innovation for China’s socialist basic economic system, and also an important theoretical innovation, reflecting the combination of theoretical innovation, institutional innovation and practical innovation. These economic systems are interrelated and mutually promoted, forming a socialist basic economic system, which is a great creation of the party and the people and an institutional guarantee for high-quality development.

　　The dominant position of public ownership has maintained the nature of the socialist system and the socialist direction of China’s economic development.Adhering to the common development of various forms of ownership has mobilized the enthusiasm of all parties, released new vitality for economic development, improved the enthusiasm and creativity of market players, and cultivated new kinetic energy for economic development. This system maintains the advantages of public assets in quantity, strengthens the control of public economy in important areas of national economy in quality, and realizes the combination of quality and quantity. By improving relevant laws, regulations and policies, we will promote and guide the healthy development of the non-public sector of the economy, so that the public sector of the economy and the non-public sector of the economy can work together to better serve the economic development in the new era.

　　The ownership structure with public ownership as the main body and multiple ownership economies developing together determines the distribution system with distribution according to work as the main body and multiple modes of distribution coexisting.The ownership system determines the distribution system, the dominant position of public ownership determines the distribution according to work, and the coexistence of various forms of ownership determines the coexistence of various modes of distribution. Taking this distribution system as the content of the basic socialist economic system ensures the long-term stability of this distribution system. The basic economic system with distribution according to work as the main body and multiple modes of distribution coexisting plays a positive role in narrowing the income gap, avoiding polarization and improving the income of workers. This distribution system has improved the mechanism that labor, capital, land, knowledge, technology, management, data and other production factors determine their remuneration according to their contributions, and improved the redistribution adjustment mechanism with taxation, social security and transfer payment as the main means, which can rationally adjust the distribution relationship between urban and rural areas, regions and groups, protect legitimate income and ban illegal income.

　　Raising the socialist market economic system to a basic economic system is an affirmation of the combination of socialist system and market economy.The socialist market economy is the combination of socialist system and market economy. Perfecting the socialist market economy system is to build an economic system with "effective market mechanism, dynamic micro-subjects and moderate macro-control", which is a combination of strong market, strong government and strong enterprises. The Fourth Plenary Session of the 19th CPC Central Committee brought the socialist market economy system into the basic economic system, which deepened our party’s understanding of the role of market economy and the relationship between market and government, and showed the world that the direction of developing socialist market economy in China will remain unchanged in the future.

　　On the basis of adhering to the main role of public ownership economy, actively explore various forms of public ownership to promote high-quality economic development.

　　The Decision of the Fourth Plenary Session of the 19th CPC Central Committee put forward "exploring various forms of public ownership" in the paragraph of state-owned economic reform. Putting "exploring various forms of public ownership" in the first sentence has profound significance.

　　On the basis of adhering to the dominant position of public ownership, we can explore the diversification of public ownership.Public ownership and its realization form are the relationship between content and form. Under the premise of adhering to the dominant position of public ownership, the realization form of public ownership can be diversified, and the organizational form and management mode of public assets can be diversified with the goal of maintaining and increasing the value of public assets. The choice of the realization form of public ownership mainly depends on the development level of productive forces. At present, China is still in the primary stage of socialism, and the multi-level and unbalanced development of productive forces in the primary stage of socialism determines the diversification of the realization form of public ownership. The diversification of the forms of public ownership includes two meanings: the first meaning is that the forms of public ownership are diversified, and its own diversification includes ownership by the whole people and collective ownership, etc., and the diversified forms of public ownership can be combined with each other to form more diversified forms of public ownership. At the same time, the carrier of property rights of public ownership is also diversified, and the management system and mode of public ownership can also be diversified. The second meaning is that public ownership coexists with other forms of ownership in the primary stage of socialism, forming an ownership structure with public ownership as the main body and multiple ownership systems coexisting. According to the diversification of public ownership forms, we can promote the separation of ownership and management rights and realize the separation of state-owned economy and state-owned assets in concept and operation, which further shows that the realization form of public ownership economy is not only the type of state-owned enterprises, but also can explore various forms of realization.

　　The state-owned economy should adjust its strategic layout, with progress and retreat.General Secretary of the Supreme Leader has made many speeches on the structural adjustment of the layout of the state-owned economy. He proposed, "Speed up the layout optimization, structural adjustment and strategic reorganization of the state-owned economy. Advance and retreat, do something different, innovate and develop a batch, reorganize and integrate a batch, clean up and withdraw a batch, promote the concentration of state-owned capital in strategic key areas and advantageous industries, and accelerate the strategic adjustment of the state-owned economy. " According to the exposition of the Supreme Leader General Secretary and the spirit of the Fourth Plenary Session of the 19th CPC Central Committee, we need to deepen the supply-side structural reform, adjust and optimize the layout structure of the state-owned economy, revitalize the manufacturing industry and the real economy, actively promote the transformation and upgrading of traditional industries, and accelerate the development of strategic emerging industries. In the economic development of the new era, around the major strategy of serving the country, we should persist in making progress and retreating, and do something different. We should invest more state-owned capital in important industries and key areas that are related to the lifeline of the national economy, especially strategic emerging industries, promote the upgrading of economic structure, optimize the layout of state-owned assets and state-owned enterprises, and cultivate new economic growth points.

　　Take mixed ownership as a new realization form of public ownership.The Fourth Plenary Session of the 19th CPC Central Committee included the reform of mixed ownership in the scope of state-owned economy, which is to bring the reform of mixed ownership into the scope of ownership reform and explore the realization form of public ownership through the reform of mixed ownership. This means that the mixed ownership economy with cross-shareholding and mutual integration of state-owned capital, collective capital and non-public capital is an important realization form of the basic economic system. This form is conducive to amplifying the function of state-owned capital, improving the competitiveness of state-owned capital, expanding the development space of private capital, and promoting and developing all kinds of ownership capital together. As a new form of public ownership, the reform of mixed ownership is not only a breakthrough in the reform of state-owned enterprises, but also brings new opportunities for the development of private enterprises. Through the promotion of mixed ownership reform, we can promote the integrated development of state-owned capital and non-public capital, thus stimulating the endogenous power of China’s high-quality economic development.

　　Improve the policy system to support the new form of public ownership.Exploring the new realization form of public ownership economy is to better adhere to the dominant position of public ownership, and developing mixed ownership economy is a new exploration of the realization form of public ownership and an important way to consolidate China’s basic economic system. However, the development of mixed ownership economy needs to improve the policy system supporting the new realization form of public ownership, and focus on solving the reform motive force of mixed ownership, the equal protection of all kinds of property rights in the reform of mixed ownership and the operation mechanism of mixed ownership. Focusing on the development of mixed ownership, it is necessary to highlight the transformation of operating mechanism, explore a management and control model that adapts to the development of mixed ownership economy, and enhance the enthusiasm and initiative of social capital to participate in the reform of mixed ownership of state-owned enterprises. We will create an integrated development of various ownership entities, use resource elements equally according to law, and form a market environment that is open, fair and just to participate in competition and equally protected by law.

　　Combine the improvement of the high-level socialist market economic system with the construction of a high-level open economic new system to promote high-quality economic development.

　　Achieving high-quality economic development requires certain conditions. This condition is the combination of the role of the government and the role of the market. The combination of a high-level domestic socialist market economic system and a high-level opening-up system is the institutional and institutional basis for achieving high-quality development. To this end, we should combine the improvement of the high-level socialist market economic system with the construction of a high-level open economic new system to promote high-quality economic development.

　　On the basis of giving play to the decisive role of the market in resource allocation, we should correctly handle the relationship between the government and the market, give full play to the role of the government, and combine the role of the government with the role of the market to promote high-quality economic development.With the goal of high-quality development, we should correctly handle the relationship between the government and the market, realize the combination of the government and the market on the basis of effectively exerting the decisive role of the market, and accelerate the high-quality development. On the one hand, realize the combination of government function and market function. In the process of economic development, we should follow the laws of market economy and improve the market system. Clarify the decisive role of the market in resource allocation and truly change the mode of economic development. At the same time, we should change government functions, give play to the role of supervision, guidance and regulation, and play the role of government through macroeconomic regulation, making up for market failures and the supply of public goods. On the other hand, a modern economic system is established through the combination of government and market. Build an economic system with effective market mechanism, dynamic micro-subjects and moderate macro-control. Through the combination of the role of government and market, on the basis of quality reform, efficiency reform, power reform and improving total factor productivity, we will accelerate the construction of a modern economic system with supply-side structural reform as the main line. Build a modern industrial system with coordinated development of real economy, scientific and technological innovation, modern finance and human resources.

　　Realize the combination of a high-level socialist market economy and a higher-level open economic new system to promote high-quality development.On the one hand, China should build a high-level socialist market economic system. Build a high-standard market system, speed up the improvement of the property rights system, and realize effective incentives for property rights. Accelerate the market-oriented allocation of factors and realize the free flow of factors. Create a unified, open and competitive market environment. Improve the property rights definition system, property rights allocation system and property rights transaction system, and promote the market-oriented allocation of factors. In accordance with the spirit of the Fourth Plenary Session of the 19th CPC Central Committee, improve the system and mechanism of scientific and technological innovation, improve the system and mechanism of encouraging and supporting basic research and original innovation, and improve the incentive mechanism of scientific and technological talents and the policy system of scientific and technological management. Establish a technological innovation system with enterprises as the main body, market orientation and deep integration of Industry-University-Research. On the other hand, it is necessary to build a new open economic system at a higher level. The Third Plenary Session of the 18th CPC Central Committee proposed to build a new open economic system, and the Fourth Plenary Session of the 19th CPC Central Committee proposed to build a new open economic system with a higher level. Comparatively speaking, the requirements for opening up are higher and the level is higher, which means that in the new era, we should implement comprehensive opening-up in a wider scope, in a wider field and at a deeper level. In order to achieve this goal, we should strive to create a market-oriented, rule-based and international business environment, further promote the construction of a new open economic system, and promote high-quality economic development with a high level of openness.

　　Author: Ren Baoping, Dean and Professor of Graduate School of Northwest University and Changjiang Scholar of Ministry of Education.

　　Recently, the Anti-smuggling Bureau of Guangzhou Customs, with the assistance of the Anti-smuggling Bureaus of Huangpu, Jiangmen, Kunming and Nanning, launched the "Fighting 28" special campaign to crack down on the smuggling of imported fruits, successfully destroyed three smuggling criminal gangs and arrested 12 suspects, involving a case value of about 1.355 billion yuan.

　　The smuggling gang involved in the case has been purchasing mangosteen, longan, durian and other fruits of Thai origin overseas for a long time in the name of a company in Guangzhou, and after transporting them to the borders of Guangxi and Yunnan, the local smuggling gang responsible for customs clearance declared imports through border small-scale trade and general trade by falsely reporting the origin and underreporting the price, and sold them to Guangzhou and other places for profit. In addition, it was found that smuggling gangs smuggled fruits in the border market under the guise of "border residents".

　　At present, the case is under further investigation. Guangzhou Customs will resolutely implement the deployment of the special action of "National Sword 2020" of the General Administration of Customs, and resolutely crack down on smuggling crimes by relying on the working mechanism of "smuggling by all staff" to safeguard the "safety at the table" of ordinary people.

　　CCTV News:2023 is the 25th anniversary of the establishment of diplomatic relations between China and South Africa, and it is also the BRICS "South Africa Year". At the press conference on August 17th, a spokesman for the Ministry of Commerce said that in recent years, under the strategic guidance and personal promotion of the two heads of state, the economic and trade cooperation between China and South Africa has made great progress.

　　Bilateral trade grew rapidly. In 2022, the bilateral trade volume between China and South Africa reached US$ 56.74 billion, a year-on-year increase of 5%, a record high in eight years. In the first half of 2023, it was further accelerated, with an increase of 11.7%. China has been South Africa’s largest trading partner for 14 consecutive years, and South Africa has been China’s largest trading partner in Africa for 13 consecutive years.

　　Two-way investment has achieved remarkable results. China is one of South Africa’s major sources of investment, with an investment stock of more than 10 billion US dollars, covering finance, home appliances, automobiles, mining, energy and other fields. South Africa is also the African country that actually invests the most in China, and the two sides have formed a stable and strong cooperative relationship in the supply chain and industrial chain.

　　Cooperation under the multilateral framework is strong and effective. The two sides jointly safeguard the non-discriminatory, open, inclusive and transparent multilateral trading system, emphasize the importance of multilateralism, and jointly promote the success of the 12th WTO Ministerial Conference beyond expectations. Relying on the BRICS cooperation mechanism, we issued a unanimous voice to support the multilateral trading system, release the potential of the digital economy, promote trade and investment and sustainable development, and strengthen supply chain cooperation.

Jing Ren She Fa No.42 [2022].

Human Resources and Social Security Bureau of each agriculture-related area:

　　In order to further deepen the "streamline administration, delegate power, strengthen regulation and improve services" reform in the field of employment, standardize the employment management of rural labor force in this Municipality, continuously improve the ability and level of employment service, and promote the rural labor force to achieve employment insurance, the relevant work on strengthening the employment management service of rural labor force is hereby notified as follows:

　　First, strengthen data support and demand inquiry

　　(1) Adjust and optimize the data platform for rural labor employment and insurance. Based on the information of agricultural registered population in this city, the scope of rural labor force is defined by sharing data such as students, labor ability appraisal, pension insurance benefits and social insurance registration. Comprehensive rural labor employment insurance status, social insurance payment period, etc., to determine the key assistance targets of employment insurance work, to provide data support for promoting rural labor employment insurance.

　　(two) to carry out the employment demand survey. Focusing on the unemployed insured rural labor force, through telephone communication, on-the-spot visits, etc., we carried out a survey of employment demand, and learned in detail the basic information, unemployment reasons, skill level and employment insurance willingness of the unemployed insured rural labor force. If the employment status of rural labor force changes, guide it to handle relevant registration in time.

　　Second, streamline and optimize the registration procedures

　　(1) Broaden the channels for handling. Eligible rural laborers can hold valid identity documents (including resident ID cards and social security cards), provide personal information on job hunting or employment transfer, and register for job hunting or employment transfer through public employment service agencies in towns (streets) where they are registered, or through online channels (including the government website of the Municipal Human Resources and Social Security Bureau, the "Beijing People’s Society" APP and the "Beijing People’s Society" WeChat WeChat official account), and inform individuals of the results in person or by SMS. When rural laborers who have the willingness to transfer employment apply for job registration or transfer employment registration, they will no longer submit materials such as subsistence allowances, disability, education, professional qualifications, employment and unemployment certificates.

　　(2) Simplify the procedures. If the rural labor force is recruited by the employer and participates in the social insurance for employees, the registration of transfer employment and the registration of employees’ social insurance shall be handled together, and the registration information of transfer employment shall be subject to the registration information of employees’ social insurance, without separate registration of transfer employment. If the rural labor force has any objection to the result of the merger, it may apply to the township (street) public employment service agency of the domicile for review. Township (street) public employment service agencies should do a good job of review, and inform individuals of the results of the review in a timely manner.

　　(3) Promote the application of social security cards. The social security card will be used as the main certificate for rural labor force to apply for job registration, transfer employment registration, enjoy public employment services and various employment promotion policies, and the Beijing Rural Labor Force Transfer Employment Certificate will be gradually abolished. The issued Beijing Rural Labor Force Transfer Employment Certificate will continue to be valid. If the rural labor force does not hold a social security card or really needs the Beijing Rural Labor Force Transfer Employment Certificate, it can apply for an electronic certificate or print the transfer employment registration record at the township (street) public employment service agency and online channels where it is registered.

　　Third, strengthen public employment and follow-up services

　　Township (street) public employment service institutions should strengthen the dynamic tracking management of the rural labor force in this city, provide refined public employment services, and record the service frequency, service effect and policy implementation throughout the process.

　　(1) For rural laborers who have not achieved employment insurance, according to their personal needs, they actively provide basic public employment services such as policy and regulation consultation, career introduction and career guidance, promote employment and entrepreneurship policies and vocational training programs, carry out job-seeking skills guidance, accurately match job information and pay a return visit to job-seeking results.

　　(two) to meet the conditions of people with employment difficulties, give priority and key assistance, carry out one-on-one employment assistance, track and solve the difficulties and problems in the employment process, and help them achieve employment insurance as soon as possible. If it is difficult to achieve employment through market channels, it can be included in the social welfare employment organization as required.

　　(3) To provide regular follow-up services for rural laborers who have achieved employment insurance, focus on the employment trends of rural laborers, strengthen the promotion of employment and social security policies, and improve the stability of rural labor employment.

　　Fourth, the job requirements

　　(1) attach great importance to it. Standardizing rural labor employment management services is an important measure to promote rural labor employment and insurance. The human resources and social security bureaus in agriculture-related areas should strengthen publicity and guidance, classify policies, provide accurate assistance, and improve the effectiveness of their work in light of the regional reality, focusing on the outstanding problems such as the uneven demand for rural labor employment and insurance, and the difficulty in transferring key assistance objects to employment.

　　(2) Focus. The human resources and social security bureaus in agriculture-related areas should increase the intensity of basic public employment services, make overall plans to promote the demand arrangement, service provision, job recommendation and policy implementation of unemployed rural laborers, and generally carry out a survey of rural laborers’ willingness to participate in employment before the end of each year. At the same time, according to the actual situation in the region, we will study and introduce targeted policies and measures to ensure the steady progress of rural labor employment and insurance.

　　(3) Strengthen coordination. The human resources and social security bureaus of the agriculture-related areas shall timely implement the provisions of the documents, strengthen the supervision, guidance and business training of the township (street) public employment service institutions, help solve the problems existing in the promotion of work, and in case of special circumstances, give timely feedback to the Municipal Human Resources and Social Security Bureau.

　　This notice shall be implemented as of December 1, 2022. If the provisions of the former Municipal Human Resources and Social Security Bureau are inconsistent with this notice, this notice shall prevail.

Beijing Municipal Bureau of Human Resources and Social Security　　　　

November 17, 2022　　

　　The total output is 1,390.8 billion Jin! This year, the grain output reached a record high, and the new era has remained above 1.3 trillion Jin for nine consecutive years. Where did the harvest answer sheet come from?

　　By policy. Grant rice subsidies, one-time subsidies to actual grain farmers, etc., and increase investment support.

　　By technology. The Ministry of Agriculture and Rural Affairs launched a large-scale unit yield improvement campaign for major crops such as grain and oil, and promoted the "five good" comprehensive solution of improved varieties, fertile fields, good laws, good opportunities and good systems.

　　By hard work. Farmland water conservancy and high-standard farmland construction have been solidly promoted, and the foundation of grain production capacity has been continuously consolidated. Storing grain on the ground and storing grain in technology.

　　Under the strong leadership of the CPC Central Committee with the Supreme Leader as the core, all localities and departments thoroughly studied and implemented the important exposition of the General Secretary of the Supreme Leader on the work concerning agriculture, rural areas and farmers, and together with hundreds of millions of farmers, wrote this heavy harvest answer sheet.

　　-editor

　

　　62.4%　

　　Contribution rate of agricultural science and technology progress　

　　To build an agricultural power, the sharp weapon lies in science and technology. In recent years, China’s agricultural science and technology innovation ability has been steadily improved, and the contribution rate of agricultural science and technology progress has increased from 54.5% in 2012 to 62.4% in 2022, which has provided strong kinetic energy for the high-quality development of agriculture. Science and technology are the fundamental way to stabilize and increase grain production. All regions and departments are guided by tackling key agricultural core technologies and oriented by industrial demand, focusing on chassis technology, key agricultural machinery and equipment, and constantly strengthening agricultural science and technology support.

　　With the support of science and technology, farming will become a "smart farming". Modern information technologies such as the Internet of Things, big data and Beidou navigation have been accelerated in planting production, and technologies and equipment such as precision sowing, smart irrigation and plant protection drones have been widely promoted. Sending skills to the fields and serving the villages, nearly 500,000 agricultural extension workers in China play an irreplaceable role in stabilizing grain supply, increasing production and income. A new technology has landed, and the fields are full of scientific and technological kinetic energy, highlighting the hard support of the "golden pole" of agricultural modernization. With the help of science and technology, agricultural production is constantly improving quality and efficiency.

　　1 billion mu　

　　Built-up area of high standard farmland　

　　Cultivated land is the lifeblood of food production, and farmland construction is a key measure to consolidate the foundation of food security in all directions. In recent years, with the joint efforts of various regions and departments, the work of farmland water conservancy has been solidly promoted, and the construction of high-standard farmland has been steadily accelerated, which has played an important role in ensuring the stable and safe supply of grain and important agricultural products. By the end of 2022, a total of 1 billion mu of high-standard farmland had been built in China, thus ensuring a stable grain production capacity of more than 1 trillion Jin, providing a basic support for ensuring a stable and safe supply of grain and important agricultural products. In the first ten months of this year, about 60.5 million mu of high-standard farmland construction was completed nationwide.

　　High-standard farmland has strong ability to preserve soil, fertilizer and water, and the average grain yield per mu is generally increased by 10%-20%, with high and stable yield, drought and flood, and green planting … At present, the quality of cultivated land in China has entered a stage of continuous improvement and overall improvement.

　　Insist on storing grain on the ground and storing grain in technology, vigorously promote the construction of farmland water conservancy and high-standard farmland in all localities, and continuously improve the quality of cultivated land, laying a solid foundation for ensuring national food security and accelerating the construction of an agricultural power.

　　73%　

　　Comprehensive mechanization rate of farming and harvesting　

　　Advanced mechanical equipment is an important material basis for storing grain in technology. At present, the comprehensive mechanization rate of crop cultivation and harvest in China has exceeded 73%, with 1.8 million sets of agricultural machinery and equipment equipped with Beidou positioning operation terminal, and the foundation of granaries in big countries has been continuously consolidated.

　　Agricultural mechanization has brought about changes in production methods. Sprinkle the medicinal plant protection drone, and you can apply fertilizer accurately by clicking the screen of the mobile phone; The electric-driven high-performance seeder cooperates with Beidou navigation and driving, and the linear error is less than 2.5 cm … In the sky, in the ground and in the internet, all kinds of intelligent agricultural machinery and equipment "show their talents", and mobile phones have become "new farm tools".

　　Agricultural mechanization is an important guarantee for grain saving and loss reduction. In the past, harvesting wheat by hand was time-consuming and laborious, and the loss was 5%-8%. Nowadays, the average harvest loss under normal conditions is only about 1%, and the new intelligent Beidou navigation combine can further reduce the harvest loss.

　　At present, agricultural mechanization is accelerating from the cultivation and harvesting of main crops to the whole process of grain production such as straw treatment and drying. Vigorously promote agricultural mechanization and intelligence, and insert the wings of science and technology into agricultural modernization.

　　23 million people　

　　Number of rural practical talents　

　　The key to rural revitalization lies in people. At present, there are more than 23 million rural practical talents in China, of which 8 million have cultivated high-quality farmers. In recent years, the demonstration and driving ability of rural practical talents has been continuously enhanced, and more and more high-quality farmers have joined the vast countryside. In 2022, the proportion of high-quality farmers who obtained the titles of peasant technicians and national vocational qualification certificates increased by 6.64 percentage points and 3.46 percentage points respectively compared with that in 2021. The participation of a large number of new forces such as college graduates and migrant workers has promoted the continuous improvement of the rural talent team structure.

　　At present, all localities and departments actively build nests to attract phoenix, strengthen the combination of local training of rural talents and external introduction, implement talent engineering projects, increase policy support, optimize the entrepreneurial environment and corresponding services, and guide more talents who love agriculture, understand technology and are good at management to join modern agriculture and rural construction. We will implement the project of cultivating "Head Goose" for rural industry revitalization leaders, carry out training for rural practical talents, further give full play to the leading role of high-quality farmers in the fields of agriculture, rural areas and farmers, and inject new kinetic energy into rural comprehensive revitalization.

　　96%　

　　Coverage rate of improved varieties of crops　

　　Seed is the "chip" of agriculture, and improved varieties play a key role in promoting grain production. In recent years, the revitalization of seed industry has been solidly promoted and a number of breakthrough results have been achieved. At present, the coverage rate of improved varieties of crops in China is over 96%, the contribution rate of improved varieties in agricultural production is over 45%, and the area of self-selected varieties accounts for over 95%.

　　This year is the third year of seed industry revitalization in China. As of October, more than 530,000 germplasm resources of crops, livestock and poultry and aquatic products have been newly collected in China, and the "national team" of improved seed breeding consisting of 216 crop seed production bases and 300 livestock and poultry breeding stations has improved its seed supply support capacity from 70% to 75%. Generally speaking, China’s seed science and technology has been at the advanced level in the world. This year, all localities focused on promoting high-oil and high-yield soybean varieties, the quality of soybeans was significantly improved, and the variety structure was further optimized.

　　Promoting the revitalization of seed industry for a long time. It is necessary to give further play to the institutional advantages, accelerate the self-reliance and self-reliance of high-level seed industry science and technology, guide resource elements to gather in seed industry enterprises, and realize the modernization of the whole industry chain of seed industry.

　　6.2 million　

　　Number of new agricultural management entities　

　　Strong management system is one of the important characteristics of a strong agricultural country. By the end of September this year, there were more than 2.21 million farmers’ cooperatives and nearly 4 million family farms, and the number of new agricultural business entities reached 6.2 million. More than 1.07 million organizations have provided socialized services and become farmers’ intimate "field nannies", serving more than 91 million small farmers, covering over 1.97 billion mu.

　　Organize the advantages of farmers to appear. Farmers’ cooperative members take farmers as the main body, organize small farmers to carry out specialized production and large-scale operation on the basis of stabilizing the contracted management of farmers’ families, and cooperate to break into the market, thus effectively improving the efficiency of agricultural operation. As an effective organizational form to develop moderate scale management and modern agriculture under the market economy, cooperatives and family farms give new connotations to the two-tier management system and inject vigorous vitality into the rural basic management system.

　　Service-driven ability is enhanced. The business scope of cooperatives and family farms covers the production of major agricultural products such as grain, cotton, oil, meat, eggs, milk, fruits and vegetables, tea, etc., and has carried out contiguous planting and large-scale feeding, making a number of advantageous industries with "township name" and "local name" bigger and stronger, and promoting the integrated development of rural primary, secondary and tertiary industries.

　　Manuscript writing: Our reporters Gao Yuncai, Chang Qin and Yu Jingxian.

　　Coordinator of this period: Yin Xinyu, Cheng Juxin and Jiang Xuejie.

　　Source: National Bureau of Statistics, Ministry of Agriculture and Rural Affairs.

　　Layout design: Zhang Fangman

Xinhua News Agency, Beijing, March 23rd (Reporter Hu Hao)The case of illegal operation of vaccines in Shandong has recently aroused public concern about vaccines: what will happen if vaccines are not transported through the cold chain? Worried that the vaccinated vaccine is invalid, do you want to replant it? What’s the difference between the first-class vaccine and the second-class vaccine in transportation and use? At the media forum organized by the National Health and Family Planning Commission on the 23rd, experts from China’s immunization program answered questions of general concern.

Why should vaccines be refrigerated? How terrible is a vaccine that is not refrigerated?

Zhao Kai, academician of China Academy of Engineering and chairman of the National Committee of Experts on Immunization Planning: Vaccines are biological products made by various pathogenic microorganisms. Some vaccines are attenuated viruses, for example, the main component of measles vaccine is attenuated measles virus, which is alive; Have a plenty of inactivated vaccine, after the bacteria are inactivated, it is an active protein, which plays an immune function.

Therefore, vaccines are delicate. For example, vaccines are afraid of heat and light, and sometimes some vaccines are afraid of freezing. In order to keep the vaccine active, cold chain should be used in transportation.

Generally speaking, if there is no cold chain during the storage and transportation of the vaccine, the activity of the vaccine will be affected more or less, but it is also related to the length of time and temperature outside the cold chain.

As for whether vaccines that have not been transported by cold chain will have adverse vaccination reactions, two factors need to be integrated. One is to investigate the cold chain situation of illegal vaccine transportation, and the other is to investigate the monitoring situation of the information management system for suspected adverse vaccination reactions.

Wang Huaqing, MD, Chief Physician of China Center for Disease Control and Prevention: Theoretically, the vaccine involved is a vaccine produced by a regular manufacturer, not a fake vaccine or a fake vaccine. It has quality control in the early stage, and the safety risk will be less. The impact of not having cold chain transportation in the later period needs to be evaluated.

What is the relationship between class I vaccine and class II vaccine? What’s the difference between management?

Wang Huaqing: A class of vaccines includes three situations. First, 14 vaccines designated by the state prevent 15 diseases. Second, the increase of the provincial health administrative department is included in the national immunization plan. The third is the emergency immunization organized by the government. For example, if there is an epidemic, emergency immunization is needed, or it is possible to predict that the disease will become popular and organize group vaccination, which all belong to the first type of vaccine.

The first type of vaccine is vaccinated free of charge; The second kind of vaccine is self-funded and voluntary.

The management of the second type of vaccine is technically the same as that of the first type of vaccine. The technical requirements are the same whether in circulation or use. However, its procurement methods are different and its supply channels are different. The procurement of the first type of vaccine is carried out by the government, and then distributed step by step through the disease control system, and finally to the inoculation unit. The second type of vaccine is based on the regulations on the management of vaccine circulation and vaccination. Production enterprises can supply it directly to business enterprises, or to disease control departments and vaccination units. Business enterprises can supply disease control institutions, vaccination units or other business enterprises. So the channels are different.

Is there any difference in quality between domestic vaccines and imported vaccines?

Zhao Kai: The technological level of domestic vaccines is completely similar to that of foreign countries. In particular, the quality of vaccines, China’s 2010 edition pharmacopoeia and the European Union’s pharmacopoeia standards are the same. Some domestic vaccines and imported vaccines have been compared or observed, and they are all the same.

Every batch of vaccines produced in China must undergo compulsory inspection and audit before they are put on the market, which is called "batch inspection". Those that fail are not allowed to go on the market. I think this quality is guaranteed.

Wang Huaqing: Actually, domestic vaccines and imported vaccines require the same standards, and they will not enter the market until they reach the standard. Most of our country uses domestic vaccines, and the control of infectious diseases in China is the contribution of domestic vaccines. If there is no domestic vaccine, the control of polio, hepatitis B and measles in China will not be so good. These are all the effects obtained by inoculating children with our own vaccines. Therefore, the final evaluation depends on whether the disease has been controlled after the application of the vaccine and whether its suspected abnormal reactions have increased. In fact, from our monitoring, there is no big difference between domestic and imported vaccines.

How to deal with vaccines near the shelf life? Is it possible to vaccinate the public with expired vaccines?

Han Cheng, director of Desheng Community Health Service Center in Xicheng District, Beijing: As a primary health service center, our vaccine procurement path is very strict, and there are also strict regulations on the validity period. Drugs that have expired in the past six months cannot enter the procurement and distribution system, and the system will automatically block them. It is impossible to enter the organization. In addition, the purchase of vaccines is on a monthly basis, and one batch is used up before entering the second batch, and it is cleaned once a month, and it is uniformly distributed and purchased by the Beijing Center for Disease Control and Prevention.

How do I know if my vaccine is a problem vaccine? Can it be traced back?

Han Chengcheng: The batch number of the vaccine can be traced back. Each child has a batch number corresponding to each medicine, which can be checked. Therefore, it can be traced back to which child a batch number was hit. The validity period of the vaccine, the time of vaccination, etc. are also completely traceable.

Wang Huaqing: When the vaccine enters the disease control system, there will be a receipt form, when it was delivered, the process of delivery, its temperature, the varieties delivered and the quantity, all of which have a complete receiving record. In the process of use, there are two records, including the parents’ signature, when and what vaccine the children took, which company and the batch number. One is the vaccination certificate in the hands of the parents, and the other is the record or vaccination card of the electronic information system.

Is it necessary to confirm whether the vaccine is effectively vaccinated by antibody testing? Is it necessary to replant the vaccine?

Wang Huaqing: If you were not vaccinated in childhood, when should you replant? Different vaccines are different, which needs to be judged again.

We are all very concerned. Did I succeed after the vaccination? The international general principle is that there is no need for testing, because if the vaccine reaches a high vaccination rate, the whole population will have a barrier.

Vaccination, under normal circumstances, does not mean that everyone produces protection, because the main function of vaccine is a group. For example, if 80% to 85% of polio is successful after taking sugar pills, polio will be blocked and eliminated.

If everyone is vaccinated, we will build this crowd barrier. If some people are vaccinated and some people are not vaccinated, the disease may become popular in the future. Therefore, to control an infectious disease, we must maintain a very high vaccination rate in vaccination, especially in the use of vaccines in the national immunization program. If the vaccination rate is not high, then the disease will become popular.

　　The drug problem is related to national security, the rise and fall of the nation and the well-being of the people. It is the consistent position and firm proposition of the China government to strictly control drugs. In the past 20 years, faced with the severe challenge of the rapid development and spread of the drug problem, the China government has always attached importance to drug control, insisted on incorporating drug control into the economic and social development plan as an important part of national security and social stability, mobilized all social forces, took all necessary measures, and tried its best to ban drugs and benefit the people.

　　In recent years, especially since the 18th National Congress of the Communist Party of China, under the strong leadership of the CPC Central Committee, the State Council and local party committees and governments at all levels, all relevant departments in various regions have adhered to source management, systematic management, comprehensive management, and legal management, and insisted on taking multiple measures to prohibit planting, trafficking, and smoking. Through unremitting efforts, China’s drug control struggle has achieved remarkable results.

　　Mobilize all forces to form a new pattern of comprehensive drug control

　　Since the late 1990s, the drug situation has become increasingly severe and complicated. Faced with this situation, the CPC Central Committee and the State Council have made a series of strategic decisions to strengthen drug control work, and the responsibility system, leadership system, working mechanism and guarantee mechanism for drug control work have been gradually established and improved, forming a new pattern of comprehensive drug control with unified leadership of governments at all levels, organization and coordination of drug control committees, respective responsibilities of relevant departments and extensive participation of social forces.

　　In 1990, the Government of China established the National Narcotics Control Committee composed of 25 departments, including the Ministry of Public Security, the Ministry of Health and the General Administration of Customs, to study and formulate important policies and measures in drug control, coordinate relevant major issues, and lead the national drug control work in a unified way. In 1998, the State Council approved the Ministry of Public Security to set up an anti-drug bureau. Since the national people’s war against drugs was launched in 2005, according to the development and changes of the drug problem in China, the State Council has repeatedly adjusted and enriched the member units of the National Narcotics Control Committee to meet the needs of the anti-drug struggle. At present, the number of member units of the National Narcotics Control Committee has reached 38, and working groups on anti-drug publicity and education, anti-drug investigation information, and drug prohibition and detoxification have been established.

　　Adhere to drug control according to law and gradually improve the legal system of drug control.

　　The government of China attaches great importance to the construction of the legal system of drug control, constantly speeds up the pace of drug control legislation, and has formulated and promulgated a series of laws and regulations. The legal system of drug control has been gradually improved, and drug control according to law has become the guiding principle of drug control work.

　　From the 1970s to the 1990s, the China Municipal Government successively promulgated the Criminal Law, the Customs Law, the Regulations on Administrative Penalties for Public Security and other laws and regulations. On June 1st, 2008, China’s first law comprehensively regulated drug control — — People’s Republic of China (PRC) Anti-drug Law was formally implemented. As a book summarizing China’s experience in drug control for many years and absorbing the essence of international drug control legislation, it provides legal guarantee for comprehensively strengthening drug control work under the new situation, and China’s drug control work has thus entered a new historical stage of comprehensive promotion according to law.

　　At present, a system of anti-drug laws and regulations has been formed at the national level in China, with the Criminal Law, the Anti-drug Law, the Regulations on Drug Rehabilitation, the Regulations on the Management of Precursor Chemicals and the Regulations on the Management of Narcotic Drugs and Psychotropic Substances as the main body, and local governments have successively formulated a series of supporting laws and regulations, providing a powerful legal weapon for the anti-drug struggle.

　　Contain drug sources and crack down on drug crimes.

　　China’s anti-drug department has always maintained the trend of cracking down on drug crimes, improved the three-dimensional prevention and control system of land, sea and air mail, and innovated the methods and means of drug enforcement, which severely cracked down on and effectively deterred drug crimes.

　　First, vigorously strengthen source blocking and interception to effectively curb the source of drugs. The anti-drug department of China has continuously improved the "three lines of defense" of blocking the first line of the border, checking the second line of the mainland and cutting the main roads, airports, stations and docks, forming a three-dimensional prevention and control system covering the main land, sea, air and postal routes.

　　Second, we will continue to carry out special anti-drug campaigns and effectively strengthen investigation and solving cases. Since the people’s war against drugs was launched, a series of special actions such as "pulling out nails" have been organized against foreign drug lords, and a large number of serious cases have been successfully cracked, and more than 80 domestic and foreign drug lords and important drug dealers, including Liu Zhaohua, Han Yongwan, Cai Aishan and Zhong Wanyuan, have been arrested.

　　The third is to comprehensively deepen the key rectification of drug control and effectively solve the prominent drug problem. By stepping up efforts to rectify drug trafficking and drug-related problems of special groups, 38,900 drug traffickers were arrested nationwide in 2015 alone. By using satellite remote sensing technology, the "Tianmu" series of drug shoveling operations were continuously carried out, and it was found that the illegally planted opium poppy was completely eradicated. Since the people’s war against drugs was launched in 2005, more than 1 million drug-related crimes have been cracked, 1.15 million drug suspects have been arrested and 751 tons of various drugs have been seized.

　　Prevention education is given priority to, and people’s awareness of drug control is generally improved.

　　The Anti-drug Law of People’s Republic of China (PRC) defines the policy of "prevention first" in anti-drug work, and stipulates the anti-drug publicity and education in a special chapter.

　　Public security, education, civil affairs, judicial administration, culture, trade unions, the Communist Youth League, women’s federations and other departments insist on taking teenagers, unemployed people and migrant workers as the focus of anti-drug publicity and education, create rich carriers of brand education activities, organize anti-drug publicity activities covering the whole year with the national anti-drug publicity month in June as the focus, and promote anti-drug publicity and education into communities, schools, units, families, places and rural areas.

　　At present, China has established 9 national demonstration bases for drug prevention education, more than 20 provincial anti-drug education bases, more than 700 anti-drug social organizations and more than 1 million anti-drug volunteers. The annual growth rate of newly discovered heroin users has dropped from 13.7% in 2008 to 6.6% in 2013.

　　Advocating people-oriented, actively educating and saving drug addicts

　　In view of the serious harm caused by drug abuse to drug addicts, their families and society, we have comprehensively used legal, administrative, economic, educational and medical means to control the drug problem, and education has saved a large number of drug addicts.

　　At present, 57 drug rehabilitation places have been built in China, and 95,000 drug rehabilitation personnel have been resettled, which has played a positive role in ensuring people’s livelihood and maintaining social harmony and stability.

　　In recent years, China has made great efforts to promote community detoxification and community rehabilitation, with towns and streets as the main body, relying on the masses and communities, mobilizing social forces, developing anti-drug social workers, and vigorously implementing the "August 31" community detoxification and community rehabilitation project. In the past five years, 27,000 community drug rehabilitation and community rehabilitation offices have been established nationwide, with 27,000 full-time drug control social workers and 68,000 part-time social workers. A total of 950,000 person-times of community-based drug rehabilitation have been carried out nationwide, and more than 1.2 million people have given up drug addiction for more than three years.

　　Strictly prevent illegal loss and strengthen the control of precursor chemicals

　　Proceeding from the fact that China is a big producer and exporter of chemicals, the national drug control department has earnestly implemented the 1988 United Nations Convention against Illicit Traffic in Narcotic Drugs and Psychotropic Substances.

　　Over the years, China has always attached importance to the "two-way investigation" in border areas and entry and exit ports, which not only prevents drugs from entering the country, but also prevents precursor chemicals from being smuggled out of the country. At the same time, an international verification system for the import and export of precursor chemicals has been established jointly with the United Nations anti-drug agencies and relevant national authorities, and a management information system for precursor chemicals has been established, which has implemented information management for the production, operation and circulation of precursor chemicals. Over the years, China has actively participated in Operation Purple, Operation Topaz and Operation Prism carried out by the United Nations anti-drug system, and cooperated closely with the Shanghai Cooperation Organization to further strengthen the international verification of precursor chemicals exported by key varieties and countries.

　　Since the People’s War against Drugs, more than 23,000 tons of precursor chemicals and non-regulated chemicals have been seized through strict investigation, and 20,500 tons of precursor chemicals have been prevented from being exported through international verification.

　　Actively fulfill international conventions and make contributions to the world drug control cause.

　　The Government of China has always attached importance to international cooperation in drug control, and, as a responsible big country, has always followed the principle of "extensive participation, shared responsibility, comprehensive and balanced drug control strategy, and emphasis on alternative development" put forward at the twentieth special session of the General Assembly on drug control, and earnestly implemented international drug control conventions.

　　Actively promote regional bilateral and multilateral drug control cooperation. The Government of China has hosted many important multilateral international conferences, continuously deepened the mechanism of Memorandum of Understanding (MOU) on drug control cooperation in Greater Mekong Subregion, the mechanism of "ASEAN+China" on drug control, the mechanism of Shanghai Cooperation Organization on drug control, and the mechanism of BRICS countries on drug control, and actively demonstrated China’s influence in the international drug control field.

　　Actively promote law enforcement and security cooperation in Mekong River Basin. In close cooperation with relevant countries, the case of "October 5" Mekong River was successfully solved in 2011, and naw kham, the first offender of the "Golden Triangle" mega-armed drug trafficking group, and key members were arrested. Leading the establishment of a law enforcement and security cooperation mechanism in the Mekong River Basin of China, Laos, Myanmar and Thailand, and continuing to carry out joint anti-drug operations to jointly crack down on transnational drug crimes and completely destroy criminal groups that have long endangered the security of this basin.

　　Actively carry out foreign law enforcement training, equipment and material assistance exchange and alternative development. China has gradually developed from a recipient country to an annual donation of US$ 1 million to the United Nations Office on Drugs and Crime (UNODC), and has trained nearly 2,000 drug enforcement officials for Myanmar, Laos, Cambodia and other countries within its capacity.

Machine heart report

Editor: Chen Ping, Du Wei

Have you ever seen a drone that can withstand a strong gust? Researchers at the California Institute of Technology use deep neural networks to make drones no longer afraid of the wind.

When the wind is strong enough to blow out the umbrella, the drone is steady, like this:

Flying against the wind is a part of air flight. On a large scale, when pilots land their planes, the wind speed may bring them challenges. On a small scale, gusts will also affect the flight of drones.

At present, drones either fly under controlled conditions and have no wind; Or operated by humans using a remote control. Unmanned aerial vehicles are controlled by researchers to fly in formation in the open sky, but these flights are usually carried out under ideal conditions and environments.

However, in order for UAVs to perform necessary but daily tasks autonomously, such as delivering packages, UAVs must be able to adapt to wind conditions in real time.

In order to make the UAV have better maneuverability when flying in the wind, a group of engineers from California Institute of Technology developed a deep neural network Neural-Fly, an artificial intelligence tool, which can keep the UAV agile in windy conditions, and only need to update some key parameters to help the UAV cope with new and unknown wind conditions in real time.

At the beginning of the article, we have seen the wind resistance of the UAV. The following shows a quadrotor UAV. With the help of the tool developed by this research, it can complete the figure-eight shuttle operation when the wind speed reaches 27 mph:

Watch the drone flying against the wind from another angle;

In order to allow the UAV to shuttle in various wind speeds, data is essential. This research needs little data. After obtaining the flight data in just 12 minutes, the automatic quadrotor UAV equipped with Neural-Fly learned how to respond to strong winds. "The amount of data used is very small," said Michael O’Connell, a graduate student in the Department of Aeronautics and Astronautics at California Institute of Technology and one of the authors of the paper.

The study was published in the journal Science Robotics on Wednesday.

Address: https://www.science.org/doi/10.1126/scirobotics.abm6597.

ArXiv Address: https://arxiv.org/pdf/2205.06908.pdf

In the Neural-Fly experimental training, the UAV flies in the wind tunnel with six different wind speeds, the fastest of which is 13.4 mph.

Based on these data, the team created a deep neural network, and then enabled their aircraft to skillfully maneuver in the same wind tunnel, such as enlarging the gate in a figure-of-eight pattern or cruising through two oval gates. The speed of the drone in the test is faster than it encountered in the training: about 27 miles per hour. This is the maximum wind speed that the wind tunnel can produce, pointed out Shi Guanya, the author of this paper and a graduate student of California Institute of Technology. Except that only a small amount of data is needed, the software only runs on Raspberry Pi, which is a cheap computing device.

Soon-Jo Chung, a professor of aerospace, control and dynamics systems at California Institute of Technology and a correspondent, said that the error rate they saw was 2.5 to 4 times better than that of the existing SOTA technology.

The picture below shows Shi Guanya, Soon-Jo Chung and Michael O’Connell from left to right. Congratulations, Shi Guanya will join the Robotics Institute of Computer College of Carnegie Mellon University as an assistant professor in September 2023.

The researchers said that this technology will be used for drone express delivery or flying cars in the future.

Overview of Neural-Fly technology

If unmanned aerial vehicle (UAV) wants to realize continuous commercialization, it is very important to perform safe and accurate flight maneuvers in dynamic high-speed wind. However, because the relationship between different wind conditions and their influence on the maneuverability of UAV have not been deeply studied, it is challenging to design an efficient robot controller using traditional control design methods.

"Neural-Fly" proposed by researchers of California Institute of Technology is a data-driven method. As a trajectory tracking controller based on deep learning, it can learn to adapt to rapidly changing wind conditions. Figure 3(A) below shows the data collection process; 3(B) When the wind speed is 13.3km/h (3.7m/s), input and label the training data; 3(C) is the distribution of input data and label data under different wind conditions.

On-line Adaptive+Off-line Meta-learning

Figure 2 below is an overview of the Neural-Fly method, which shows that it has made progress in adaptive flight control and robot control based on deep learning. Under the dynamic wind conditions of standard UAV, Neural-Fly can track the centimeter-level position error of flexible and challenging trajectory. Specifically, this method mainly consists of two parts, namely, offline learning stage and online adaptive control stage for real-time online learning.

For the off-line learning stage, the researchers developed Domain Adversarial Invariant Meta-learning (DAML), which learned the expression of deep neural network (DNN) which is independent of wind conditions in a data-efficient way. This representation adapts to different wind conditions by updating the linear coefficients of a set of mixed depth neural network outputs.

DAIML also has data efficiency, and only 12 minutes of flight data under six different wind conditions are used to train the deep neural network. DAIML contains several key features, which can not only improve data efficiency, but also provide information by the downstream online adaptive control stage.

It is worth noting that DAIML uses spectral normalization to control the Lipschitz property of deep neural network, so as to improve the generalization ability of unknown data and provide closed-loop stability and robustness. In addition, DAIML also uses discriminant network to ensure that the learned representation is wind-invariant, and the wind-related information is only included in the linear coefficient that adapts to the online control stage.

For the on-line adaptive control stage, researchers developed a regularized compound adaptive control law, which is based on the basic understanding of how the learned representation interacts with the closed-loop control system and has strict theoretical support.

Specifically, the adaptive law uses the combination of position tracking error term and aerodynamic prediction error term to update the linear coefficient related to wind. This method effectively ensures the stability and rapid adaptation to any wind conditions and the robustness to imperfect learning. Although this adaptive control law can be used with many learned models, the accurate representation learned from DAIML is helpful to further improve the adaptive speed.

experimental result

As far as the effect of Neural-Fly is concerned, it is 66% higher than that of nonlinear tracking controller, 42% higher than that of L_1 adaptive controller and 35% higher than that of incremental nonlinear dynamic inversion (INDI) controller. All these results are achieved by using standard quadrotor UAV hardware, and the default attitude control of PX4 is running at the same time.

The tracking performance of Neural-Fly is competitive even compared with related work without external wind interference and using more complicated hardware (such as on-board optical sensor that needs 10 times control frequency and uses DC motor speed feedback).

Table 1 below shows the error tracking statistics of different methods under different wind conditions.

The researchers compared Neural-Fly with two variants, namely Neural-Fly-Transfer and Neural-Fly-Constant. Among them, NF-Transfer uses representations trained from data of different UAVs, while NF-Constant only uses adaptive control laws with trivial non-learning basis.

Neural-Fly-Transfer shows the robustness to UAV configuration changes and model mismatch. NF-Constant, L_1 and INDI methods all directly adapt to unknown dynamics without assuming the underlying physical structure, and they have similar performance.

Finally, the researcher proves that Neural-Fly can realize a series of functions, allowing the UAV to follow the trajectory and fly over the low-altitude door quickly under the condition of strong wind, as shown in Figure 1 below.

Reference link:

https://www.science.org/doi/10.1126/scirobotics.abm6597

https://www.popsci.com/technology/neural-fly-ai-drone-in-wind/? THE END

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Original title: "Have you ever seen a drone that can hold strong winds? Caltech teaches drones to fly against the wind with 12 minutes of flight data.

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Since March, the price of gold has continued to rise, setting a new record! The domestic gold price once appeared "overnight soaring". After accumulating a large increase, recently, the international gold price fluctuated at a high level, and the gold price that had previously maintained an upward trend sat on a "roller coaster".

How to rationally allocate limited assets in the gold market and make sustained profits has become an urgent problem for investors.

The price of gold suffered a major decline after the peak.

On April 12, local time, Loco London gold rose all the way in the morning, rising nearly 2.5% in intraday trading, but then plunged sharply, which not only retreated all the gains of the day, but also finally closed with a decline of 1.25%, with a retreat of nearly 4% in the day; Futures prices also followed the spot price out of a similar market. COMEX gold futures once rose more than 3% in intraday trading and finally closed down 0.53% at $2,360.2 per ounce.

Affected by the high diving of the international gold price, the increase of Shanghai Gold also narrowed on the night of April 12, and it once rose more than 4% in intraday trading, and then it was adjusted back, and the increase fell back to 0.15% at the close.

On the evening of April 10th, the latest data of ——CPI (Consumer Price Index), the most critical inflation data before the Federal Reserve’s May resolution, was released. The US CPI rose by 3.5% year-on-year in March, which was higher than the market expectation of 3.4%. This figure intensifies the fear that inflation will accelerate again, which means that the possibility of the Fed cutting interest rates in June will decrease. The market’s expectation of the timing and frequency of the Fed’s interest rate cut this year has also changed to two times since September.

After the data was released, the international gold and silver prices fell briefly. However, the year-on-year growth rate of the US PPI (ex-factory price index of industrial producers) in March announced on the evening of 11th was slightly lower than expected, and the chain growth rate slowed down to 0.2%, which made gold and silver "rebel" again.

On April 12, COMEX gold reached a maximum of $2,448.8 per ounce; Spot gold in London once reached $2,431.78 per ounce, both hitting record highs.

The gold price of jewelry is almost equal to 730 yuan/gram.

High prices "persuade" consumers

For the recent rise in gold prices, many netizens have commented on "regret not getting on the bus" and "the price of gold jewelry is too high". Some netizens also said, "Now this price is just needed and I dare not buy it."

"This period of time is a price per day. Generally speaking, it is a small increase or a small increase." The sales of a gold shop in Chengdu told reporters, "The price of gold has really risen too high recently, and many consumers are waiting to see. I have served a couple who are about to get married before, bought a ring before the New Year, and recently wanted to buy earrings, bracelets and other accessories, just because the price of gold has risen too high recently, I have been hesitating."

The salesperson told reporters that if you are in a hurry to get married, you can consider platinum rings, and there has been no big price fluctuation recently.

The reporter visited several brand gold stores in Chengdu and found that the listing price of gold jewelry today is slightly lower than that of 730 yuan per gram a few days ago. At present, the prices of jewelry in gold jewelry stores of brands such as Lao Fengxiang, Chow Tai Fook and Zhou Shengsheng are mostly between 720 yuan and 728 yuan per gram. In the actual purchase process, different brand stores will give different degrees of concessions through in-store concessions, discounts and full reduction, and the final price will be between 680 yuan and 710 yuan per gram.

"The peak period of gold consumption is generally around the New Year. Now, after entering March and April, consumers’ purchasing enthusiasm has declined, and passenger flow and transactions will be less." A clerk in a gold jewelry store told reporters that the price of gold has been rising recently, and some "non-just-needed" consumers will also choose to wait and see.

Explore the reasons for the sudden drop in the price of gold

After analysis, the researchers studying financial issues in the Climate Change and Energy Transformation Project of Peking University Energy Research Institute believe that the main reasons for the current downward trend of gold prices are as follows:

First, the value of the dollar has risen. As a substitute for the reserve currency, gold has an inverse relationship with the value curve of the dollar. Recently, the value of the dollar has suddenly increased, and investors have chosen to buy a large amount of dollars and sell gold at the same time, and the price of gold has decreased accordingly.

Second, the interest rate is raised. Recently, former US Treasury Secretary LawrenceSummers said in an interview with relevant media that the public should accept the possibility of raising interest rates by the Federal Reserve, rather than lowering interest rates. Therefore, the increase of interest rate will make investors consider whether it is reasonable to continue to buy gold without interest, which will lead to a decline in their willingness to buy, and then affect the price of gold.

Third, the expected production capacity of gold ore has increased. According to the relevant data released recently by Canadian mining giant osino, its Gemini mine project in Namibia will provide its parent company Yintai Gold with a gold production capacity of not less than 5 tons/year after it is put into production. Yintai Gold expects that the total gold production will rise to 12 tons in 2025. At the same time, Zijin Mining also expects the gold production capacity to rise to 73.5 tons in 2024. It can be seen that the increase in gold production will lead to oversupply, which will lead to a decline in gold prices.

Experts believe that the particularity of gold itself determines that it has an extremely complex market environment. For investors, it is necessary to always remember not to blindly follow the trend, "chase up and stop falling", carefully analyze the reasons for the rise and fall of the value of the invested products, and make a reasonable investment plan according to their own wealth level. Only by doing what they can can be stable and lasting and be invincible in the market. (Wu Shihao)

Comprehensive from shanghai securities news, china economic herald, China Business Daily, cover news, etc.

The cold wave hits the bone, and the flu season increases the sorrow. Just after a holiday, I don’t know if everyone is well.

According to the report of influenza-like cases in the 52nd week of 2023 released by the Chinese Center for Disease Control and Prevention on January 4th, the percentage of influenza-like cases reported by sentinel hospitals in southern provinces was 9.6%, which was higher than the previous week’s level (8.8%) and the same period in 2020-2022 (3.6%, 4.0% and 8.4%), and influenza viruses were mainly subtype A (H3N2).

On December 24th, at the press conference held in National Health Commission, Peng Zhibin, director of the Department of Respiratory Infectious Diseases of the Infectious Diseases Management Office of China CDC, said that personal protection was recommended for the elderly, pregnant women, children and patients with serious chronic basic diseases aged 65 and above.

So what should the elderly do in the face of flu season? Come and have a look with me.

First of all, we need to know what the flu is.

Influenza is an acute respiratory infectious disease caused by influenza virus.

Influenza viruses are divided into three types: A, B and C, and the main ones that can cause outbreaks are A and B, among which influenza A is mainly subtype A 1 (H1N1) and A 3 (H3N2).

Often referred to as influenza A virus. There are often symptoms such as sore throat, cough, stuffy nose, runny nose, vomiting, diarrhea, etc., which is difficult to differentiate from the symptoms of respiratory tract infection caused by other pathogens. Vaccination of influenza vaccine in advance is the most economical, effective and important measure to prevent influenza.

Secondly, why are the elderly more likely to get the flu?

The joint research team from the University of Michigan and Temple University found some clues-as people get older, a lipid that controls inflammation will gradually weaken the immune defense ability of the lungs, which will lead to the damage of alveolar macrophage, the first line of defense of the lungs, with age. Macrophages are immune cells, which are distributed in pulmonary alveoli or alveoli. Their main function is to attack external "invaders" such as influenza A virus (IAV).

In addition, the lung compliance of the elderly is decreased, the respiratory muscle strength is weakened, and the cough reflex is also weakened. If there are factors such as coexistence of multiple diseases and malnutrition, it will easily lead to influenza infection in the elderly.

According to the latest "Technical Guidelines for Influenza Vaccination in China (2023-2024)", the elderly aged 60 and above are also classified as key and high-risk groups.

So, what kinds of influenza vaccines can be vaccinated for the elderly?

Currently, influenza vaccines on the market include trivalent influenza vaccine and tetravalent influenza vaccine.

The so-called trivalent influenza vaccine means that it can prevent the infection of three types of influenza viruses, including influenza A H1N1, influenza A H3N2 and influenza B Victoria strains.

The tetravalent influenza vaccine can prevent four types of influenza virus infection, including influenza A (H1N1), influenza A (H3N2), influenza B (Victoria) and influenza B (Yamagata). In view of the epidemic of influenza A (H3N2) this year, vaccination with trivalent influenza vaccine or tetravalent influenza vaccine can effectively prevent it.

Finally, what is the preventive effect of influenza vaccine on the elderly?

Usually after 2-4 weeks of influenza vaccination, antibodies with protective level can be produced. The protective effect can last for 6-8 months, and then the antibody begins to decay.

Special reminder

In daily life, the elderly should frequently open windows for ventilation, strengthen air circulation, exercise regularly and maintain a good lifestyle. In the flu season, try to avoid going to closed places where people gather.

Xiaobian also specially sorted out the vaccination information of the vaccination clinic in Jinshan District. If necessary, you can go to the vaccination according to the vaccination information.

Compile | manage you

Image | network intrusion and deletion

Original title: China CDC: It is recommended to vaccinate against influenza as soon as possible, especially for the elderly.

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