electronic invoices for fried string are catering invoices. This is because fried skewers are a kind of food, specifically a catering product. In the tax classification, catering services are classified as "life services". Therefore, when merchants provide services for fried string foods and issue invoices, they should choose the electronic invoice of "life service" category.

in addition, when issuing electronic invoices, merchants need to ensure the accuracy of invoice information, including the names of both parties to the transaction, the details of the transaction, the amount, etc. This information will be recorded in the electronic invoice as legal evidence of the transaction.

To sum up:

The electronic invoice for fried string belongs to catering invoice, so the "life service" tax classification code should be selected. Merchants should ensure the accuracy of information when issuing electronic invoices, so as to safeguard the rights and legality of both parties.

Legal basis:

Article 21 of the Measures for the Administration of Invoices of the People's Republic of China stipulates: "All units and individuals engaged in production and business activities shall obtain invoices from the payee when purchasing goods, receiving services and paying for other business activities."

Article 6 of the Value-added Tax Law of the People's Republic of China stipulates: "When a taxpayer sells goods or provides taxable services, it shall issue a special VAT invoice to the buyer who requests the special VAT invoice, and indicate the sales amount and output tax amount on the special VAT invoice respectively."

article 4 of State Taxation Administration of The People's Republic of China's announcement on tax collection and management issues related to the pilot project of changing business tax to value-added tax (State Taxation Administration of The People's Republic of China announcement No.23, 2116) stipulates: "When taxpayers provide taxable services, they shall issue special invoices for value-added tax to the recipients who ask for special invoices for value-added tax, and indicate the sales amount and output tax amount on the special invoices for value-added tax respectively."