The credit line minus the outstanding posted amount minus the accumulated amount that has not been posted equals the available line. The available balance of ICBC card is the credit line minus the outstanding paid amount minus the accumulated unrecorded amount, which is equal to the available line of convertible ICBC card, that is, the bank card issued by ICBC. ICBC card is a bank card issued by ICBC, which is divided into savings card and credit card. Savings cards can be used to save money before consumption, and can be used for financial investment, but there is no overdraft function. Credit card has a certain credit limit, which is a kind of overdraft card.