1. If the car loan credit card is over-repaid, the excess money will become over-repaid, and the bank will not calculate interest for the user. Therefore, people can't enjoy the current interest rate of debit cards if they deposit the amount in their credit cards.
2. After many credit cards are over-repaid, it must be noted that bad debts are likely to form, which has no less impact on users' personal credit than credit card cashing.