In early autumn, in Nanshan, Liyang, Jiangsu, chestnut trees are covered in fluffy "little prickly balls", and these harvested chestnuts will become delicious on the dining table. Developing forest food represented by chestnuts according to local conditions, the vast mountains and forests have become a "green grain depot". In Lianyungang, known as the "Seaweed Capital of China," seaweed is processed and transported to various parts of the world every day. The seaweed industrial park in Zhewang Town alone produces 6 billion pieces of seaweed annually, with an annual output value of 2 billion yuan, driving about 2000 people to work. It is truly a "fertile land" on the sea. In recent years, Jiangsu Province, where the per capita arable land is less than one mu, has broken the traditional thinking of food sources, actively established and practiced the concept of big food, deeply explored the unique resource endowments of various regions, and demanded food from rivers, lakes, seas, mountains, forests, and rivers. With diversified food supply, it has filled the granary of the country and enriched the dining tables of the people. Hong Fan and Ba Zheng, Shi is the leader of politics Food security has always been a top priority for the national economy and people's livelihood, and an important cornerstone for safeguarding national security. Establishing and practicing the concept of big food and building a diversified food supply system are important measures to ensure national food security and build an agricultural powerhouse. Recently, the State Council executive meeting made important arrangements for implementing the concept of big food, proposing to "consolidate the supply foundation of grain and important agricultural products", "expand direct and indirect sources of food, and improve the level of food quality and safety", etc. The report of the 20th National Congress of the Communist Party of China clearly proposes to establish a big food concept, develop facility agriculture, and build a diversified food supply system. From the data, China's grain production has remained stable at over 1.3 trillion kilograms for several consecutive years, with a per capita grain possession of over 490 kilograms, exceeding the internationally recognized food security line of 400 kilograms. In 2023, China's total meat production will be 97.48 million tons, dairy production will be 42.81 million tons, and poultry and egg production will be 35.63 million tons. The consumption demand for meat, eggs, and milk among Chinese residents is showing an upward trend year by year. With the increasing demand for high-quality protein such as meat, eggs, milk, and aquatic products, the demand for feed grains is also growing rapidly. These data reflect changes in people's dietary structure and also place higher demands on the diversity of food supply. Establishing a big food concept is an inevitable measure to adapt to the changes in food consumption structure and meet the consumption upgrade of the people from "eating enough" to "eating healthily". The concept of big food emphasizes that the problem of eating should no longer be limited to traditional food crops, but should be expanded to a broader range, including meat, eggs, milk, fruits, vegetables, fish, mushrooms, and bamboo shoots. In addition to arable land, China also has a large amount of forest land, grassland, rivers, lakes, and seas. Expanding the space for agricultural production, developing diverse food varieties, and enriching supply channels can not only better meet the increasingly diverse food consumption needs of the people, but also further consolidate the foundation of food security. Practice the concept of big food and promote the optimization and upgrading of the agricultural industry structure. On the one hand, we should increase investment in agricultural technological innovation to improve agricultural production efficiency and quality. For example, promoting excellent varieties, advanced cultivation techniques, and breeding models, developing smart agriculture and precision agriculture, and improving land productivity, resource utilization, and labor productivity. On the other hand, we should actively develop new agricultural formats such as characteristic agriculture, ecological agriculture, and leisure agriculture, and promote the integrated development of the primary, secondary, and tertiary industries. Taking characteristic agriculture as an example, each region can fully leverage its own resource endowment advantages, adapt to market demand, and create agricultural products with local characteristics according to local conditions. Featured agricultural products such as Gannan navel oranges, Wuchang rice, and Yangcheng Lake hairy crabs not only enrich people's dining tables, but also enhance the potential for food supply. Practice the concept of big food, promote efficient utilization of resources and sustainable development. In the context of increasingly tight resource and environmental constraints, practicing the concept of big food can help achieve efficient utilization and sustainable development of resources while ensuring food security. Developing and utilizing non arable land resources such as oceans, forests, and grasslands can reduce pressure on arable land. Developing eco-friendly agriculture is beneficial for reducing agricultural non-point source pollution. By promoting green production technologies, reducing the use of fertilizers and pesticides, strengthening the resource utilization of agricultural waste, and developing water-saving agriculture, we will promote green and low-carbon agricultural production. Various regions should strengthen the support of scientific and technological equipment, leverage the role of science and technology in modernizing agricultural production, accelerate breakthroughs in relevant core technologies, improve agricultural production efficiency, and tap into the potential of food supply. In addition, practicing the concept of big food requires establishing a sound food safety supervision system to ensure food quality and safety. Strengthen the supervision of the entire process of agricultural products from the field to the dining table, crack down severely on food safety violations and crimes, and ensure that people can eat with peace of mind and health. Practicing the concept of big food cannot be separated from the joint participation and efforts of the whole society. Ensuring food security is a systematic project that requires the participation and support of multiple parties. Give full play to the guiding role of the government, improve top-level design, strengthen policy support, and enhance investment and guarantee in agricultural technology innovation, infrastructure construction, ecological environment protection, etc; Actively cultivating new types of agricultural management entities, activating market forces, and better meeting the diverse food consumption needs of the people. At the same time, guide consumers to form a healthy consumption concept, pay more attention to food diversity and balanced nutrition in daily life, cultivate good habits of saving food, and provide assistance for ecological agriculture and sustainable development. (New Society)