a lot. There are mainly the following types:

First, unlicensed operation, including starting business without a valid food business license (catering service license), or having a previous license but exceeding the time limit or changing the address, person in charge or adding licensed items without authorization;

second, the staff work without health certificate;

third, the source of purchase is unknown, and the system of accounting and ticket collection has not been established;

fourth, the operation of unqualified food is mainly obtained through sampling inspection results;

5. The food safety management system and management team have not been established or improved;

6. dealing in expired or spoiled food;

VII. Other foods, food additives and food-related products whose production and operation are prohibited as stipulated in Article 34 of the Food Safety Law.

that's all. of course, there are many others, so I won't list them one by one.