hello! It's an overdue fee. 1. The interest is calculated according to the full amount. From the day of the transaction, it is calculated at .5 ‰ of the principal every day until it is fully paid off

2. If it is not enough on time, a late fee will be charged, and the late fee will be charged at 5% of the minimum unpaid part of the current period. The interest is the same as the first question

3. This question depends on what installment you are handling. If the card self-selected installment is enabled, all transactions will be automatic before this function is turned off. If you choose bill installment, each application will only be accepted once, and then the credit card transaction will be recalculated, that is to say, after installment, you need to repay the installment amount every month, plus the amount that has not been installment.