I stayed in a hotel for seven days before, but now I have lost my ID card. Can I stay?

Any hotel must comply with laws and regulations.

You can apply for temporary identification first.

Opinions of the Ministry of Public Security on establishing the system of collecting, reporting and reporting the loss of resident identity cards in different places.

The first point is article 8:

Provide temporary identification service. For those who need to board the plane, take the train or stay in the hotel urgently because of the loss, theft, forgetting to bring their resident ID cards, the airport, railway station police station and police station under the jurisdiction of the hotel will issue temporary identification certificates in time by inquiring the identity of the personnel approved by the national population information system for the next flight, train and stay in the hotel.