The final repayment date of the Bank of Communications credit card is the 25th day after the billing date, and your billing date is the 25th day (fixed), that is to say.

Generate bill 4.25 to record the transactions from March 26th to April 25th, and the final repayment date of the transactions during this period is the 25th day after April 25th, that is, 5.20.

Generate bill 5.25 to record the transactions from April 26th to May 25th, and the final repayment date of the transactions during this period is the 25th day after May 25th, that is, 6. 19.

And so on.

Obviously, the interest-free period of 4.25 on the billing date is the shortest, which is 25 days (4.25 brush and 5.20 times), and the interest-free period of 4.26 on the first day after the billing date is the longest, which is 56 days (4.26 brush and 6. 19 times). Credit card full repayment before the final repayment date is interest-free. It should be noted that credit card consumption has an interest-free period, and cash withdrawal has no interest-free period.

If you have other specific questions, I suggest you call the customer service staff of the bank, hoping to help you.