The grace period for credit card repayment of Hunan Bank is 3 days. This means that after the credit card repayment date comes, the cardholder can repay within 3 days, which is not overdue. Credit card grace period means that banks give cardholders a certain delay in repayment, and most banks provide a grace period of 2 to 3 days. As long as the repayment is made within the grace period, it will not be overdue and there will be no penalty interest.