Credit card consumption of CCB enjoys an interest-free repayment period of 20-50 days. If the billing date is 23rd or 24th, consumers can enjoy an interest-free period of up to 50 days. For example, if the billing date on August 23rd is August 24th, then the consumer on August 24th will settle the bill on September 23rd, because the billing date of the current month has already passed, which will last for 30 days, plus 20 days after the billing date.