China has made great achievements in food safety governance, but there is still a problem of unbalanced and insufficient development. In this paper, the multidimensional dual structure analysis framework is introduced to understand the food safety governance problems. The study found that there were regional dual structure, urbanrural dual structure and institutional dual structure in Chinese food safety problems, and there were obvious differences between different dual structures. The dual structure has been an important reason to restrict the highquality development of food safety in China. The multidimensional dual structure interweaves to form a governance problem of food safety. In view of this, the introduction of the concept of social cogovernance on the premise of attaching importance to the government efficiency is the way to break the governance of food safety in China.

The disequilibrium between supply and demand of agricultural products is a common problem being faced by many countries with severe novel coronavirus pneumonia. It has caused serious losses to agricultural producer income and urban consumer welfare. It points out the imbalance between the supply and demand of agricultural products in our country under the new crown pneumonia epidemic: the production end of agricultural products is difficult to sell, farmers suffer heavy losses, the consumption end of the agricultural product supply is tight, and the basic characteristics of residents welfare are damaged. This study uses uncertainty economics theory to comprehensively analyze the internal mechanism of the disequilibrium between the supply and demand of agricultural products in China. The results indicate that the outbreak of COVID-19 epidemic has brought serious uncertainty to the health and safety of practitioners engaged in the circulation of agricultural products, which was regarded as the main reason for the disequilibrium between supply and demand. The uncertainty was demonstrated by the dramatically increasing circulation cost of agricultural products and the enforced interruption of the transactions and logistics for some agricultural products. Therefore, it is suggested that government should implement insurance system for public health emergency, innovate the business model for agricultural products circulation, increase the temporary subsidy, release the epidemic risk level directly and train the antiepidemic ability for agricultural product circulation practitioners. These public efforts would reduce the additional cost caused by the uncertain factors such as epidemic situation, ensure the effective operation of supply chain for agricultural products, and guarantee the safety and stability of agricultural industry chain, which would be helpful to avoid the recurrence of the similar issue on disequilibrium between supply and demand.

In order to meet the development needs of high-quality farmers' education and training in the new era, we should use information means to improve the participation of high-quality farmers in online training. In this paper, the training quality of high-quality farmers is analyzed in detail by the analytic hierarchy process. Aiming at the current needs of high-quality farmers, the training quality evaluation algorithm is proposed, and the training quality comprehensive model is constructed. An experiment is conducted to verify the effectiveness of the proposed method. Finally, this paper focuses on applying the Collaborative Filtering Recommendation Algorithm based on student course scores to the training course recommendation module and gives the implementation method of key parts of the course recommendation system.