Why can I remember when the hotel stopped using the room?

Because the hotel rooms are full on holidays, the price will double, so hotels generally don't put too many vacant rooms on the platform, but leave some rooms for guests who enter the store to book. The platform also knows this, but selling one more room can get an extra commission, so sometimes the hotel changes the number of vacancies and then the platform secretly changes it back. Of course, it is also possible that the reservation system of the platform is out of control.