After I checked into the hotel, I changed rooms. Can someone check it?

This requires the hotel to be irresponsible. Generally, someone goes to a hotel to find someone, and the hotel front desk will register, so the situation you mentioned may also happen. And even if you check in, you will still be found in case of rounds. The best way is for both parties to provide ID cards to the hotel, which is also for the safety of all guests. root ...