Legal analysis: The publicity of food safety grade is the grade evaluation made by the food supervision department according to the standard degree of daily management of licensed food business units. After the evaluation, a grade publicity board will be given without the operator's handling. The safety level of catering food is divided into three levels: A (excellent), B (good) and C (general), and the default level is C.

legal basis: article 27 of the product quality law of the people's Republic of China, the national standards for food safety are formulated and promulgated by the health administrative department of the State Council in conjunction with the food and drug supervision and administration department of the State Council, and the national standard number is provided by the standardization administrative department of the State Council. The limits of pesticide residues and veterinary drug residues in food and the inspection methods and procedures shall be formulated by the health administrative department of the State Council and the agricultural administrative department of the State Council jointly with the food and drug supervision and administration department of the State Council. Inspection rules for slaughtering livestock and poultry shall be formulated by the administrative department of agriculture of the State Council in conjunction with the administrative department of health of the State Council.