Many merchants' payment codes do not support credit card payment. Although they are all WeChat payments, they are also divided into platforms. There is no problem with big supermarkets, but not with small vendors. They can only choose WeChat change or savings card to pay and change the payment method.

The credit card limit bound by WeChat payment is insufficient.

It's not the same as a bank savings card. Savings cards can't be repaid without money, and credit cards can be overdrawn. However, since it can be overdrawn and there is a limit, when the credit card overdraft limit is not enough, it is naturally impossible to pay.

Or the credit card WeChat exceeds the payment limit

Whether it is a credit card or the WeChat payment we use, there are certain limits, such as the daily maximum and the annual maximum. Once this limit is exceeded, the payment will fail.

The credit card is abnormal and the account is frozen.

When the credit card is abnormal and the account is frozen, it cannot be paid. At this time, you can go to the bank that handles the credit card to find out the status. At the same time, if WeChat payment is abnormal and cannot be paid, it is necessary to further check what caused it.