Does the public security bureau know all the information about the room?

The registration record will be transmitted to the public security bureau. If you are a local, your household registration information will be displayed when you check into that hotel. If you are a foreigner and apply for a temporary residence permit, you can find the information about staying in a hotel, such as the local police station of the Public Security Bureau (that is, 1 city) 1 city, but your personal information, if you don't apply for a temporary residence permit, only the police station on the other side of your household registration can find your hotel information.

This thing will not be eliminated in a few years, but don't worry. It's nothing. In order to help petitioners and criminal suspects, the Public Security Bureau has made this systematic knowledge.