There is an old Chinese saying goes that the people can't live without food. Food is the foundation of the survival and development of human, and food safety is the most critical part. Food safety relates to the health and life safety of people, the economic development and social stability of the nation, and also to the images of government and country. However, with the development of technology, the market economy itself is not able to insure the safety of food, which causes the market malfunction...