Are you asking whether the catering industry can make its own food and freeze it? You can't.

according to the food safety operation standard for catering service (No.395 [2111] of the State Food and Drug Administration): Article 12 Personal hygiene requirements for employees, Article (5) clearly stipulates that "personal belongings shall not be brought into the food processing area." Each catering service area has a special person in charge, and it is not allowed to use the refrigerator of the restaurant without permission to prevent cross-infection of food.

catering service: refers to the service activities that provide consumers with food and places and facilities for consumption through instant processing, commercial sales and service labor.