Possibility 1: Have you done any pre-authorization? For example, reservations for hotels, car rentals, etc. usually occupy the quota first and will not be recorded in the account. Also, if your transaction has not yet been recorded, that is, the merchant has not settled with the bank, it will occupy the quota and will not be recorded temporarily, so the transaction cannot be queried. Details.

Possibility 2: The poster has more than one CCB credit card, that is, multiple CCB credit cards. The limit is exclusive and not cumulative. If card A is used, the limit of card B will also be used. It will be less.

If the poster is not sure or able to judge, it is best to call the customer service hotline to inquire!