The repayment date of Minsheng Bank's credit card is determined according to the billing date, which is generally the 20th day after the billing date. At present, the credit card bills of Minsheng Bank are 1, 3, 6, 9, 13, 16, 2 1, 26, 28. Assuming that the cardholder's monthly billing date is 1, then the monthly repayment date is 2 1.