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 European and American standard industry classification, catering industry refers to catering service institutions with the purpose of 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, preparing and selling food to customers for on-site consumption in a certain place.