catering is a food production and operation industry that provides consumers with all kinds of drinks, food, consumption places and facilities through instant processing, commercial sales and service labor. According to the definition of Standard Industry Classification in Europe and America, the catering industry refers to catering service institutions that aim at commercial profit. In China, according to the definition in the Notes on the Classification of National Economic Industries, the catering industry refers to the service activities of cooking, modulating and selling food to customers in a certain place for on-site consumption.