Flying pig booked for three days and only stayed for one day. How to settle accounts?

If you check out in advance, you can settle for only one day.

Official website showed that the flying pig booked for three days and only stayed for one day. He can check out in the remaining two days, but he needs to apply for checking out one day in advance. If the application is late, it will affect the rental situation of the hotel and cause damage to the hotel. So if he informs and applies the day before, he can refund the fee for one day. But if the application is late, it must be settled at the predetermined price.