canteens and restaurants belong to the same nature, and both belong to catering enterprises. Even a small restaurant for one person has to pay taxes. You can, you can report it to the local tax authorities for investigation.

Article 21 of China's Measures for the Administration of Invoices stipulates: "Units and individuals that sell goods, provide services and engage in other business activities shall collect money from foreign businesses, and the payee shall issue invoices to the payer." Obviously violated the above provisions.