no. Sealing the stairs is easy to cause fire and safety problems, which can not meet the escape requirements and meet the requirements of relevant laws, regulations and standards. Therefore, it is not possible to seal the stairs on the second floor at the entrance of the restaurant. Catering, also known as catering industry, 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.