I think they can evade taxes without invoices. So I always ask for it. The catering industry is different from other retail industries, such as shopping malls. There will be a certain quota, but I don't think catering has it. She only pays taxes on sales, and the tax rate should be 5%. Therefore, in any case, we should ask for an invoice for any restaurant we go to. In fact, it can be judged whether there is a scratch area on the invoice, and the state encourages the invoice to set up a scratch area.