The final repayment date for CCB credit cards is the 20th day after the statement date. Your credit card bill date is the 10th (fixed), that is to say

The bill is generated on 10.10, recording transactions between 9.11 and 10.10, and the final repayment date is the 20th day after 10.10, that is, 10.30

The bill is generated on 11.10, recording the transactions between 10.11 and 11.10. The last repayment date is the 20th day after 11.10, that is, 11.30

And so on.

Obviously, the interest-free period for 10.11 purchases on the bill day is the shortest, with 20 days (pay on 10.10, pay back at 10.30), and the interest-free period for 10.11 purchases on the first day after the bill date is the longest, with 50 days (pay on 10.11, pay back at 11.30) ). It should be noted that there is an interest-free period only for card purchases, but there is no interest-free period for cash withdrawals.