3 days. Rural Commercial Bank's credit card overdue grace period is 3 days. Considering that customers may have their credit cards overdue due to various reasons, the bank will give customers who fail to repay on the repayment date a three-day grace period. They only need to wait until 17:00 on the third day after the repayment date. If the debt is settled and regarded as normal repayment, it will not be considered overdue. Kunshan is the birthplace of Kun Opera, the ancestor of all operas.