The agreed account of CCB will be debited on the day after the due repayment date, so you only need to ensure that there is money in the savings card on the day after the due repayment date. If the first deduction is unsuccessful, the bank will send you a short message, which means that you can deposit the money directly into a credit card or a savings card, and the savings card will deduct the money twice on the fourth day after the due repayment date.