If there is no quick payment function on the credit card, you can call the customer service phone of the bank credit card center to apply for opening, and then you can scan the code to pay;

2.

If the credit card cannot be scanned for payment because the credit card limit is insufficient, you can apply for a temporary limit;

3.

If it is because you have reached the credit card limit of the day, you can use it the next day, or you can call the credit card center to apply for adjusting the daily limit;

4.

Some merchants' code scanners themselves do not support credit card QR codes. In this case, other payment methods need to be replaced.