After the pre-authorization freezes the funds, according to the regulations of CCB, if the merchant fails to make any follow-up application for the pre-authorization amount within 30 days, the pre-authorization will automatically release the unfrozen funds. If the merchant applies for pre-authorization one day within 30 days, it will credit the card according to the amount you actually spend and unfreeze the money at the same time. If the pre-authorization is revoked, there will be no deduction. Generally, CCB will unfreeze the funds and return them to the card the next day after receiving the application from this merchant.