For US dollar repayment by credit card, you can use the cash deposit in the debit card. According to the query of relevant public information, it can be bound to a credit card. Then on the due repayment date, as long as the money in the savings card is sufficient, the bank will deduct RMB from the savings card to the credit card, and then discount it according to the exchange rate on the day of deduction. After converting into U.S. dollars, the debt in U.S. dollars will be repaid.