The final repayment date of CCB credit card is the 20th day after the bill date. The bookkeeping date is 25th of each month (fixed), that is to say

The bill was generated on September 25th, and recorded the transactions from August 26th to September 25th. The final repayment date of the transactions during this period was the 20th day after September 25th, namely 10. 15.

A bill 10.25 is generated, which records the transactions during September 26th-10.25, and the final repayment date of the transactions during this period is the 20th day after 10.25, namely 1 14.

And so on.

Obviously, the shortest interest-free period is 20 days (9.25, 10. 15) on the billing date, and the longest interest-free period is 50 days (9.26,1kloc-0/4) on the first day after the billing date. It should be noted that credit card consumption has an interest-free period, and cash withdrawal has no interest-free period.