The latest retention time of seven-day hotel rooms.

That's the room the hotel booked for you last time. For example, you booked a room at noon and didn't leave until 23:00. Then, if you haven't left by 23: 00, they can sell your room to other guests if they are nervous. If you can't arrive on time, you need to call before 23: 00 to change the reservation time, because the hotel can't reserve a room for you for the whole night. It often happens that guests who have booked a room don't go, stay empty for one night, and other guests come and have no room to sell. Causing losses to the hotel.