Invoice is the maximum monthly ticket purchase amount approved by the tax bureau, which can be collected once a month or after opening. If it is collected once a month, the tax bureau will deduct the remaining blank invoices when selling new invoices, and only give the difference, that is, the used invoices. You don't need to use up the invoices to collect them. If you have a blank invoice, you can also get a new invoice, but the total amount of the invoice you get again plus the rest in your hand cannot exceed the amount of votes approved by the tax authorities.

Legal basis:

Measures of People's Republic of China (PRC) Municipality on Invoice Management

Nineteenth units and individuals that sell goods, provide services and engage in other business activities receive money from foreign operations, and the payee shall issue an invoice to the payer; Under special circumstances, the payer will issue an invoice to the payee.

Article 20 All units and individuals engaged in production and business activities shall ask the payee for invoices when they pay for goods, services and other business activities. When obtaining the invoice, you are not allowed to change the name and amount.