The century changing situation and the century epidemic situation are intertwined and superimposed. The world has entered a period of turbulence and change. A variety of predictable and unpredictable risk factors have increased significantly. Food security is particularly important and fundamental. The role of "stabilizer" and "ballast stone" is becoming more and more prominent. Global food security sounded the alarm The food and Agriculture Organization of the United Nations defined "food security" in detail three times in 1974, 1983 and 1996 respectively. In 1974, it was emphasized that food security is "anyone can get enough food for survival and health at any time"; In 1983, it was proposed that food security is "the basic food that anyone can buy and afford at any time"; In 1996, it was further clarified that food security is "to enable all people to have access to sufficient, safe and nutritious food at all times materially and economically to meet their dietary needs and food preferences for an active and healthy life". Novel coronavirus pneumonia, a world food security organization, was released in July 12, 2021 by international organizations such as FAO, WFP and international agricultural development fund. It was the first report on global food security after the outbreak of the outbreak of the new crown pneumonia in 2021. The report points out that between 720 million and 811 million people worldwide will face hunger in 2020, an increase of 161 million compared with 2019. In 2020, nearly 2.37 billion people will not have access to adequate food, an increase of 320 million in just one year. The outbreak of novel coronavirus pneumonia has added to one disaster after another. In June 16, 2020, Beasley, executive director of the world food programme, published a signed article in the foreign affairs journal, pointing out that New Coronavirus had made it difficult for the public health system to stand up and had a strong impact on the economy around the world, which could trigger a global hunger crisis. The novel coronavirus pneumonia epidemic spread worldwide, resulting in a shortage of agricultural labor force. Many countries were affected by the epidemic and delayed farming. In Europe and North America, food production mainly depends on immigration. Under the epidemic, countries closed their borders, resulting in limited labor mobility, and a serious shortage of labor needed to grow and harvest food crops. In particular, the epidemic has led to the obstruction or interruption of the global food supply chain, and the international transportation of food has become more difficult. Some countries have stopped grain exports, and some regions even have the phenomenon of grain storage and rush purchase. In addition, the food crisis can breed instability. Research shows that every 1% increase in hunger in a given country will lead to 2% of the population emigrating. Refugees crossed the border, turning already fragile areas into potential flashpoints of unrest. Climate change and other related disasters exacerbated the food crisis. The United Nations Intergovernmental Panel on climate change, the food and Agriculture Organization of the United Nations and other agencies have released reports that since 2009, the probability of extreme weather phenomena such as drought and high temperature is much higher than that in the 1980s and 1990s, which has seriously affected the global food supply. Some scientists predict that if greenhouse gas emissions continue to rise at the current rate, one third of the world's food production will be threatened by the end of this century. In the summer of 2021, Russia, the United States and Canada, the world's major wheat producing countries, suffered the impact of extreme dry weather, affecting their wheat harvest. Global wheat export prices rose 46% in 2021. In addition to the yield, agricultural experts are more worried that the rain will make crops sick and affect the quality of crops. Affected by climate change, pests that destroy important cash crops are becoming more destructive. In addition, the food crisis has been exacerbated and the level of nutrition of crops has been reduced to a certain extent. The frequent occurrence of global armed conflicts and violence affects food security. Recently, the conflict between Russia and Ukraine has stirred the international food market. Russia is the world's largest wheat exporter, accounting for 17% of the world's wheat exports. Ukraine is known as the "European granary" and is the world's second largest grain exporter. The two countries together account for about 29% of global wheat exports and 19% of global corn export supply. At present, under the continuous influence of the war between Russia and Ukraine, the futures prices of wheat and corn are rising, close to the highest level in history. In 2021, military coups took place in Chad, Mali, Guinea, Sudan and other countries. Even in Ethiopia, where the headquarters of the African Union is located, the government declared a state of emergency due to the civil war, affecting the agricultural development of the country, which is the pillar of its national economy and foreign exchange earning through export. The spread of novel coronavirus pneumonia and the bad security situation have made Africa face the decrease of foreign direct investment, unemployment and debt crisis. Some countries are suffering from food crisis. According to the world food programme, more than 20 million people in sub Saharan Africa are already on the verge of famine. In January 2022, riots occurred in many places in Kazakhstan. If the situation is not controlled in time, this conflict will directly affect the food security in Central Asia, because Kazakhstan is one of the world's major food producers and exporters. Take the road of food security with Chinese characteristics As China moves closer to the center of the world stage, the greater the tension of national development, the greater the pressure and resistance it will face. An important manifestation is the increasing risk of overseas import, and the increasingly complex exogenous variables affecting China's food security. On October 14, 2019, the white paper on China's food security was released for the first time. In China, grain is divided into grain, soybean and potato according to varieties. Among them, grains mainly include rice, wheat and corn. Among the three Cereals, rice and wheat are also known as "rations". At present, rice and wheat are completely self-sufficient, and the breeding level is not far from that of developed countries. The import and export is mainly variety adjustment. China's grain self-sufficiency rate exceeds 95%, and there is only a large gap between soybean production and demand. The key to ensuring national food security lies in seeds and cultivated land. Seeds are the "chip" of agriculture. We should adhere to self-reliance and self-improvement in agricultural science and technology, start with cultivating seeds, strengthen the tackling of key problems in improved seed technology, and rely on Chinese seeds to ensure China's food security. In July 2021, the 20th meeting of the central comprehensive Deepening Reform Commission deliberated and adopted the action plan for the revitalization of the seed industry, raised the seed source security to a strategic height related to national security, and focused on solving problems, making up weaknesses, strengthening advantages and controlling risks. In February 22, 2022, the CPC Central Committee and the State Council made the recommendations on the key work of Promoting Rural Revitalization in 2022, that is, the No. 1 central document issued in 2022. This is the No. 1 Central Document No. nineteenth since twenty-first Century guiding the work of agriculture, rural areas and farmers. The document points out that we should firmly adhere to the two bottom lines of ensuring national food security and preventing large-scale return to poverty. In practice, the CPC Central Committee clearly requires the "rice bag" to share the responsibilities of the party and the government. Local Party committees and governments at all levels should shoulder the political responsibility for food security and ensure the steady improvement of food production capacity. We should store grain in the land, resolutely curb the "non-agricultural" of cultivated land and the "non grain" of basic farmland, strictly prevent sticking to the red line of 1.8 billion mu of cultivated land, implement the hard measures of "long teeth" for cultivated land protection, and strive to build 1 billion mu of high-standard farmland. We will improve grain production support policies, implement incentive policies, improve interest compensation mechanisms, and protect farmers' enthusiasm for growing grain. Innovate and improve the grain market system, strengthen the dominant position of enterprises in innovation, strengthen the scientific and technological support for food security, vigorously promote the tackling of key agricultural core technologies such as seed sources, and promote the construction of major national innovation platforms in the field of seed industry. In addition, we attach great importance to reducing food loss and waste and promoting the construction of an energy-saving society. As the world's largest developing country and a responsible big country, China has always been a positive force in safeguarding world food security. At the global level, China has taken the initiative to share food security resources and experience, actively participated in the governance of world food security, and strengthened international exchanges and cooperation. At present, in order to prevent the food crisis caused by the epidemic crisis, we need to adhere to multilateralism and take globally coordinated response measures to ensure the smoothness of the global food supply chain and alleviate the impact of the epidemic on the whole food system. One belt, one road, is also necessary to further develop grain production in the region. China will continue to make positive contributions to safeguarding world food security and promoting common development. (Xinhua News Agency)