According to the query chart, official website learned that the credit card of Lanzhou Bank has a three-day repayment grace period, which means that the credit card holder can repay the loan three days after the last repayment date. Units that provide "time service" for cardholders should provide cardholders with a certain period of repayment grace period service. The repayment grace period is at least 3 days from the due repayment date. If the cardholder repays within the repayment grace period, it is deemed that the cardholder repays on time.