legal analysis: the dynamic level is the evaluation of the food safety management status of catering service units by the regulatory authorities every time. The dynamic level is divided into three levels: excellent, good and average, which are represented by three cartoon images: laughing, smiling and flat face.

legal basis: food safety law of the people's Republic of China

article 35 the state practices a licensing system for food production and operation. Engaged in food production, food sales, catering services, shall obtain a license according to law. However, sales of edible agricultural products and sales only in prepackaged foods do not require permission. Only selling prepackaged foods shall be reported to the food safety supervision and administration department of the local people's government at or above the county level for the record.

article 36 small food production and processing workshops and food vendors engaged in food production and marketing activities shall meet the food safety requirements stipulated in this law that are appropriate to the scale and conditions of their production and marketing, and ensure that the food they produce and market is hygienic, non-toxic and harmless, and the food and drug supervision and administration department shall strengthen supervision and management.

the local people's governments at or above the county level should comprehensively manage small food production and processing workshops and food vendors, strengthen services and unified planning, improve their production and business environment, encourage and support them to improve their production and business conditions, enter fixed places such as centralized trading markets and shops, or operate in designated temporary business areas and time periods.

specific measures for the administration of food production and processing workshops and food vendors shall be formulated by provinces, autonomous regions and municipalities directly under the central government.