Research on the management problems of food quality and safety in China Research on theory and practice of food quality and safety supervision 并列题名:Research on theory and practice of food quality and safety supervision Research on security system of agricultural products quality and safety in China Research on the management of social security of floating population in China Study on government management of agri-product quality and safety in China Research on the management and control system of food quality and safety from the perspective of food supply chain Study on service management problems of commercial banks in China 并列题名:Research on the management of social security of floating population in China Research on prevention and control of food safety risks in China