1. The user may have made a cash transaction and be recognized by the system. For example, transactions are made on the machine for many times in a row, and the UnionPay system determines that there is a risk in the user's account.

2. It is possible that the credit line has not been restored after the repayment.

3. the user's credit card is overdue, and the overdue situation is serious, which damages the customer's credit.

can I pay more by credit card?

yes. If you deposit more money in a credit card, it is equivalent to depositing a sum of money in a credit card. This money will not generate any interest, and a part of the handling fee will be charged when it is taken out. If you don't take it out, it will be deducted first in the repayment next month. If credit card users continue to use it, they will