1. It is possible that your credit card payment exceeds the transaction amount you set at that time.

2. It may be caused by network delay or system failure.

If the credit card is frozen, you can't use it.

4. If it is a large amount, it may be that the credit card has been controlled by the card issuer. In other words, your card bank suspects that you are suspected of malicious overdraft or cash withdrawal.

If you spend a lot of money on a risk-controlled POS machine, even if your card is normal, it will not pass.