How many days is the interest-free period of ICBC 12 Constellation Credit Card?

The interest-free repayment period of ICBC's credit card refers to the time when other overdraft transactions except cash withdrawal and transfer can enjoy interest-free treatment from the bank bookkeeping date to the due repayment date. The longest is 56 days and the shortest is 25 days. How long the interest-free period can be enjoyed depends on the billing date, repayment date and consumption time of the credit card.