If you don't know the password, just go to the drugstore where you can brush medical insurance and buy something casually and ask what the password is! If you have the initial password, it is generally easy to remember, such as 1234,, etc. The balance will be printed on the signature note printed on the machine that swipes the card, and the balance will be displayed on the consumption list after each swipe! You can go to the bank to change your password, because social security cards are bound to the bank. You can change your password by going to the ATM of which bank you have your social security card! It's very convenient ... you can also go to the local medical insurance bureau to change your password (bring your ID card)!

Further reading: How to buy insurance, which is better, and teach you how to avoid these "pits" of insurance.