If the repayment is made by direct cash withdrawal or transfer (peer or inter-bank), the bank is allowed. After all, you bear the interest of credit card overdraft (the interest of credit card overdraft is much higher than that of ordinary loans). Therefore, this method is generally used as an emergency measure when the loan repayment period comes to avoid the bad record of overdue repayment.
As for what many people say, the same as above, but in different ways. This method is a big taboo for banks. Once found, it will directly lock the card and put it in the "blacklist" ~ It will be extremely difficult to apply for a card or loan in the future, so be careful.
If you are referring to the repayment function on platforms such as Alipay and Quick Money, you are not allowed to directly use credit cards for repayment for the time being. The system will automatically recognize the payment and the credit card number will be banned. The only slight difference is Tenpay, which currently uses the balance of Tenpay to repay the loan. It is said that there are still several banks' credit cards that can be used to recharge Tenpay, so there may be some Confucius here ~
Finally, you take your credit card to the bank counter and pay back on the spot. This method is also the same as the first case. If you are traveling together, you can do it on the spot. If it is inter-bank, you need to prepare cash in advance, or take the form of transfer/remittance.
I hope my answer can help you. If you think it's helpful, remember to click "agree" first! You can ask questions if you don't understand. I am waiting for you to adopt! Hehe ~ o