According to the stipulation that the due repayment date of CCB is 20 days after the bill date, if the landlord wants to change the due repayment date, that is, the bill date of his credit card can be changed, but it is stipulated that it can only be changed once a year, and the two bill date changes must be separated by one year.

The landlord can change the bill in two ways:

After registering through his credit card website to complete the real-name authentication, click "Online Customer Service" in the upper right corner of the webpage (working hours: 9:00- 17:00).

Second, through his customer service hotline.