Bank of China credit card grace period: The regular card has a grace period of 3 days, and the Platinum card has an 8-day grace period. If a credit card is overdue for more than 60 days, all the cards in the name will be unusable. You need to repay as soon as possible. After the repayment, the card will automatically return to normal. If the repayment is overdue for more than 180 days, the card status cannot be restored. After the repayment is received, other cards can be restored. Use of Cards. Bank of China is a large state-owned commercial bank in China. Founded in 1912 and headquartered in Beijing, it is one of the largest banks in the world by assets and provides a wide range of financial services, including personal banking services, commercial and corporate banking services, and investment banking services. , insurance and fund services, etc.