1. Insufficient or no credit line. To swipe a credit card normally, the credit limit must be within the remaining credit limit. For example, in 500 yuan, the available credit limit in your credit card must be above 500.

2. The credit card is frozen, which may be because the payment password is wrong for three consecutive times, or because the long-term overdue repayment is frozen, or because the case is frozen by the Public Security Bureau.

3. The status of the credit card or account is abnormal, for example, the cardholder spends money in a place that has never been consumed, or the card is illegally swiped by the bank.

4. There are restrictions on the trading of credit cards in overseas or special merchants. Credit cards are not available in every place and every merchant, and some merchants do not support credit card payment.

5. If the credit card expires or reports the loss, it is forbidden to handle non-counter business after the credit card expires. If the cardholder applies for reporting the loss, the amount in the card will not be traded.

6. If the credit card is degaussed, it must be reissued. The premise of replacing the card is to report the loss, and there will be a loss reporting fee. The loss reporting fee of each bank's credit card is different.

When you find that your credit card in China Bank is out of order, you can exclude it from the above reasons. It is best to contact the issuing bank as soon as possible and ask for details. Only by understanding the reasons for the failure of the transaction can we solve it better.