There are two kinds of binding repayment, which can be set. One is to repay the full amount of the month, and the other is to repay the minimum repayment amount of the month. On the settlement date, the bank will calculate how much you should pay back and then look at your cash account (debit card). If it is full, pay it in full, and if it is the minimum payment, deduct it. If your cash account is insufficient, the bank will not deduct your money. For example, if you want to pay back 5 10, and the account is only 500, the bank will not deduct your cash and ask you to take the initiative to pay back, otherwise it will be a phone call. I had this experience again.

As for what you said about depositing money into a credit card, of course, it is to settle the credit card money first, and then calculate your own cash account.

As for whether there is any deduction, you can apply for SMS notification. In addition, you can call the customer service phone of the credit card for inquiry.