Through the understanding of how to use the credit card, the credit card itself has no balance, so the credit card cannot be directly used to repay the loan. If you want to borrow it by credit card, you need to return it first. Generally speaking, the withdrawal amount of credit is 50% of the total credit card, that is, if you borrow money by credit card, the maximum amount you can repay is 50% of the total credit card. However, this method of borrowing money after withdrawing cash by credit card is not worth advocating, because the interest charged after withdrawing cash by credit card is calculated according to the daily interest of five ten thousandths, which is higher than the daily interest of borrowing money.