There are red spots on the hotel wall tiles.

This is an infrared camera. There is a red dot on the wall brick of the hotel, which is an infrared camera. People can't see them, but they can see them with their cameras. After the camera is found in the hotel, it is necessary to fix the evidence as soon as possible, ask for compensation as post-support, and then contact the hotel manager for handling. You can call the police if necessary.