The original invoice for buying a house with a loan looks like this.

The "Measures for the Administration of Invoices issued by the People's Republic of China" has corresponding provisions:

Article 19 Selling goods, providing services and engaging in other business activities When entities and individuals collect payments for external business operations, the payee shall issue an invoice to the payee; under special circumstances, the payee shall issue an invoice to the payee.

All units and individuals engaged in production and business activities shall obtain invoices from the payee when making payments when purchasing goods, receiving services, or engaging in other business activities. When obtaining the invoice, no request is made to change the product name or amount.