Firewood, rice, oil and salt, one vegetable, one rice, are not only household chores, but also the foundation of a country. Recently, the research team of Zhejiang University's Yangtze River Delta Smart Oasis Innovation Center successfully achieved cell culture of salmon, which has attracted widespread attention and is expected to provide new ideas for cultivating and obtaining high-quality proteins. Technological innovation has enriched the variety of food on people's dining tables. Food terms such as "cellular meat", "alternative protein", and "future food" have frequently appeared in news reports, academic reports, technology forums, and other occasions. In addition to producing food, people can also create new types of food, and a new food revolution is on the rise. From the Central Rural Work Conference in 2015 to the report of the 20th National Congress of the Communist Party of China, which put forward the idea of "building a big food concept, developing facility agriculture, and building a diversified food supply system", to the No. 1 central document in 2024, which put forward the idea of "building a big agriculture concept, a big food concept, expanding food sources through multiple channels, and exploring and building a big food monitoring and statistics system", the "big food concept" not only meets people's expectations for a better life, but also points out the direction for high-quality development of food technology and industry. The development and changes over the years, from grain to food, reflect the new atmosphere of China's economic takeoff and abundant resources and people. With the improvement of living standards, people's demands for food have changed from "being full" and "eating well" to "eating healthily and richly". However, in terms of resource endowment, China only has 9% of the world's arable land and 6% of the world's freshwater, but it feeds nearly 20% of the population. So where should we go to tap the potential? To practice the concept of big food, it is necessary to find a way out from the perspective of technological innovation, improve efficiency, expand sources, and transform methods through technological innovation. We need food from forests, rivers, lakes, and seas, and we need "increment" from multi-dimensional space. Enable policies and technological systems to escort technological wonders. What is the supply capacity of China's major food resources? While strengthening the research on national food security strategy, it is necessary to fully evaluate and tap into the supply capacity of large food resources, explore the construction of a monitoring and statistical system for large food, strengthen the collection and research of food consumption data for Chinese residents, expand the formulation of nutrition standards from traditional agricultural product scope to large food scope, accelerate the construction of a quality standard system that is suitable for the concept of large food, and lead agricultural food production with standardization and digitization. In recent years, it has become a common form for higher education institutions, research institutions, and enterprises to establish industrial technology alliances and consortia. In the process of practicing the concept of big food, we should also encourage this form, promote the integration of scientific research and development, production and manufacturing, and promotion and application of industry academia research and application, increase the research and development efforts of emerging technologies such as biosynthesis and artificial synthesis, and promote the application of biological breeding, strengthen the innovation of food variety production methods, expand research in the biological industry, and promote the deep integration of technology and industry development. Using technology to shape a large-scale food production pattern that adapts to resources. The source of big food has expanded from arable land resources to the entire national land resources. We must follow the principles of "suitable grain for food, suitable economy for economy, suitable pasture for animal husbandry, suitable fishing for fish, and suitable forest for forest", increase our research efforts on forests, rivers, lakes, and seas, and through the guidance and support of technology, ensure that green mountains and clear waters are transformed into golden mountains and silver mountains, and comprehensively and comprehensively develop food resources in multiple ways to better meet the needs of people's better lives. Fujian is located near the mountains to develop a "forest granary", and is surrounded by water to create a "blue granary". The food supply is more diverse, fully demonstrating the practical power of the big food concept. Accelerate the use of biotechnology to develop and tackle key practical technologies such as edible protein and feed substitutes, expand new sources of food and feed, and demand heat and protein from plants, animals, and microorganisms. Data shows that food protein, as one of the most important nutrients for humans, is expected to meet a demand of around 265 million tons by 2050. Traditional protein will not be able to meet human future living needs. We not only need to accurately configure and improve the utilization of food protein resources from a technical perspective, but also need to focus on the development direction of cell culture meat, functional recombinant proteins, etc., and be determined to seize the high ground of international research, achieving a transformation from following and leading. Advocate for the formation of a joint effort to promote the concept of big food. To practice the concept of big food, it is necessary for the government, scientific research institutions, social organizations, schools, enterprises, and other parties to work together to form a joint force, adhere to local conditions and market orientation, strengthen policy formulation, financial investment, technological research and development, and result transformation. Special attention should also be paid to educating young people on the concept of big food and cultivating their healthy lifestyle. The just concluded 6th Beijing Primary and Secondary School Student Food Education Practice Activity was jointly carried out by science and technology museums, research institutions, social organizations, schools, and other parties, attracting more than 6000 primary and secondary school students to actively participate. There are various projects such as nutritious meal making, recipe design, and campus food safety experiment challenges. Students showcase their entries on site and have face-to-face exchanges with scientists. Through various methods, students have improved their concept of healthy eating and effectively promoted the deepening of the concept of big food in people's hearts. A solid granary brings peace to the world. Technology empowers the concept of big food, opens up new ways to obtain food, enriches food categories, optimizes structure, and ensures quality. It enables people to eat fully, well, healthily, and abundantly, further satisfying the people's yearning for a better life and steadily lifting people's happiness on their tongues. (Lai Xin She)