Three knocks and three reports means that the hotel needs to knock on the door three times to enter all the rooms, and it has to report its identity every time. According to the relevant information query:

1. When you enter all the rooms in the hotel, you need to knock. Sometimes knock once or twice, if you don't pay attention, you may not hear it, so the hotel will ask you to knock three times before entering the door.

2. Knock on the door for * * * three times, with an interval of 3-5 seconds each time, and report your identity while knocking, such as: Hello, waiter or housekeeping, hello, room attendant, never open the door while knocking.

3. After three times of no response, gently open the door with the room card. When you open the door to 45 degrees, knock again and report yourself. At the same time, check whether there is a room card inserted into the card slot and judge whether there are guests in the room.