Can I call the police if I don't pay the rent of 20 million?

You can report the landlord's refusal to issue invoices to the tax bureau and ask him to reissue them.

But it might fall out. You can apply to the local local tax bureau for issuing invoices.

Invoice refers to the business vouchers issued and collected by all units and individuals in buying and selling goods, providing or receiving services and engaging in other business activities. It is the original basis of accounting, and it is also an important basis for law enforcement inspection by audit institutions and tax authorities. Receipt is the proof of receipt and payment, and invoice can only prove that the business has happened, but can't prove whether the money has been received or paid.