The credit limit is 5,000 and the cash withdrawal limit is 3,000, which means: the total limit is 5,000, only 3,000 can be withdrawn in cash, and the other 2,000 can only be used for credit card consumption and cannot be withdrawn in cash. The available limit of 6900 may be that you have deposited money this month or the total repayment limit exceeds 5000. If the total repayment is 6900, it will display the available limit of 6900. The balance of -400 means that the limit you can use your card to spend now is only 400. .It should be like this. Otherwise, you can find out by calling customer service and asking.