Legal analysis: generally speaking, it refers to the cancellation of credit card pre-authorization, which refers to the transaction in which the card issuer or its agent confirms the permitted frozen amount before the deduction of the special merchant. Pre-authorization will occupy the credit limit of the card. When the customer settles the pre-authorization, the pre-authorization will be cancelled. Within 30 days of pre-authorization, if the customer fails to settle the account, the pre-authorization will be cancelled.

Legal basis: Measures for the Administration of Credit Card Business

Article 2 Commercial banks and their branches, cardholders and special units accepting credit cards in People's Republic of China (PRC) must abide by the provisions of these Measures.

Article 3 The term "credit card" as mentioned in these Measures refers to the credit payment instruments issued by commercial banks in People's Republic of China (PRC) (including foreign-funded banks and Sino-foreign joint venture banks, hereinafter referred to as commercial banks) to individuals and units.

Credit card has the functions of transfer settlement, cash deposit and withdrawal, consumer credit and so on.