If you are bound to the agreed repayment account, the bank will deduct the money the day after your last repayment date. Maybe it's because you paid back the loan on the evening of the last repayment date and the bank hasn't received it yet, so they deducted the money according to the regulations. But don't worry, if you pay again, the extra money you save will be deducted from the later consumption.

For example, suppose your card bill date is the 7th, and the amount payable for 6/7 of your current bill is 2000 yuan. On the last repayment date, the bank has deducted 2000 yuan from your agreed repayment account, and then you manually paid back 1 000 yuan. Assuming that you have no other overdraft transaction after the card bill date, the extra deposit of 1000 yuan is your overpayment, that is, your own extra deposit. This 1000 yuan can be withdrawn at CCB in the province where your issuing bank is located, and no handling fee is required. However, if you overdraw again after the billing date, for example, you overdraw 1200, then your excess 1000 will be deducted first, so the amount still overdrawn is 200.