For security reasons, what should I do after entering the hotel room and closing the door? It's urgent, thank you.

Check the plan of the fire emergency passage and know where you are. It's best to go out for a walk. Insert safety chain. Try not to walk around the room naked. Valuables are placed next to the pillow. Ignore strange phone calls. Check whether the window is safe. For example, there should be a security net outside the window of the first floor room.