Every month 10. According to the inquiry of I Love Card official website, the billing date of Chongqing Rural Commercial Bank's credit card is 10 day per month, and the interest-free repayment period is from the billing date to the final repayment date. Credit card holders of Chongqing Rural Commercial Bank need to repay all the repayment within the interest-free repayment period in order to enjoy interest-free repayment.