In fact, pre-authorization can be unfrozen in advance. According to the staff of CCB, in the pre-authorization transaction of CCB's credit card, due to the freezing of this part of the amount, the credit limit of the cardholder will be reduced by one figure accordingly. If the merchant fails to pre-authorize the transaction within 30 days, the amount will be automatically unfrozen after 30 days, and the cardholder's credit limit will be restored. If the cardholder is anxious to restore the quota within 30 days, generally speaking, the hotel can pre-authorize and cancel the transaction, and the quota will be restored immediately after the transaction is completed.