The agency model is based on health, that is, medicated diet. Since ancient times, China people have respected the idea that food is the most important thing for the people. Eating is related to national security and people's health, and to physical fitness. There have been many delicious foods among the people, and there have also been health centers focusing on "eating". In this context, Yannian Medicinal Diet Workshop came into being, mainly engaged in palace and folk famous medicinal diets, and was renamed Gongyanlou in the late Qing Dynasty.