The final repayment date of CCB's credit card bill is the 20th day after the bill date. You said that your bill date is 23rd, so the final repayment date is probably 13 or 12 next month.

For example, it is calculated as follows:

Consumption from April 24th to May 23rd is the bill accumulated on May 23rd, and the final repayment date of the bill is June 12.

Consumption from May 24th to June 23rd is the bill accumulated on June 23rd, and the final repayment date of the bill is July 13.

That is, on the 5th, 24th and 23rd of June, the final repayment date is July 13. This consumption enjoyed a total of 50 days of interest-free period, 49 days on the 26th, 48 days on the 27th, and so on.