There are several possibilities. First, you have opened automatic repayment, and it is full repayment. In this way, as long as you don't pay off all the money on the debit date, the system will automatically deduct the money from your bound savings card. Another situation is that your repayment time is later than the automatic deduction time of your credit card. For example, if you use a third-party agency to repay the loan, although the deduction is on the same day, it may arrive in the bank account the next day (pay attention to the promised repayment time, some are 24 hours, some are 2 hours, and so on).