Balance refers to the repayment amount that has been recorded, including bills that have been issued and bills that have not been issued. After paying the bill, there are two possibilities for the balance to be positive. 1, the repayment has not arrived, and your bill has not been deducted. 2. The repayment has been received, but there are new transactions before the bill is issued, so the balance is still positive, but there must be a difference between the amount before and after the repayment, and the balance after the repayment is less than that before the repayment.