Generally, the check-out time can be changed on the day before check-in or before noon 12. If it can be fixed before the trigger, it is best to change it on Ctrip. It doesn't matter if it can't be repaired. When you check in, the hotel should reconfirm with the front desk. If the futures on your check-in date are cancelled, the order must be modified on Ctrip, and the order has the latest modification time.