How to lock the hotel room? Can someone open it after locking it?

The hotel has an extra room card. Usually no one will open your room. If you are afraid, put a noisy thing on the door handle of your room before going to bed, so that if someone opens your room door, it will make a noise. You will also find that after the hotel lock is locked, you can use the key to open it outside. You can hang the chain bolt, even if the lock is opened, no one can get in. Lock it again. If there is a security door chain on the door, you can also put it on. How to lock the door of a hotel room and close it after entering the room, so it will be safe. But it is necessary to carry valuables with you. Pull up the chain. Hang the chain and lock it. The waiter has a spare room card that can be opened and closed directly. If closed, it will be locked. There should be a protective chain on it. Generally, no one can open it except hotel management.