Hello, the interest-free period refers to the time period from the bank bookkeeping date to the due repayment date when the credit card holder repays all the payable amount before the due repayment date (inclusive). The longest interest-free repayment period is 50 days, unless otherwise agreed between the card issuer and the applicant, but the longest interest-free repayment period shall not exceed the longest interest-free repayment period required by relevant laws and regulations (except cash advance).