Yours should be a credit card, so there should be some differences. Available balance equals balance plus overdraft limit.

Savings card is a kind of financial transaction card issued by the bank to provide financial services for depositors, which belongs to a kind of debit card. Its main function is to deposit and withdraw money at networked ATMs and bank counters and spend it at networked POS machines.

B Credit cards are divided into credit cards and quasi-credit cards. Credit card refers to the credit card issued by the bank, which gives the cardholder a certain credit limit, within which you can spend first and then repay.

C quasi-credit card refers to a quasi-credit card issued by a bank. The cardholder deposits a certain amount of reserve funds according to the regulations. When the balance of the reserve fund account is insufficient to pay, it can be overdrawn within the prescribed credit limit. Credit cards generally refer to credit cards.