Can I still use my social security card if I stopped using the other one because I could only use one before?

You can still use it. But you need to bring your ID to the Social Security Administration to reactivate your card. The money in your social security card is your own personal account for health insurance. It's not like you can't use it just because you've stopped being insured. Don't worry, you can spend the money on medicine or hospitalization. The social security card will not be invalidated. If you stop paying your social security contributions and then renew them again, if there is no break in the middle, then it does not matter and does not affect the use of the card. If it is renewed after a break, it will have an impact on health insurance, maternity and unemployment insurance. If the payment is renewed after the interruption, the health insurance paid by the organization has to wait until the first of the next month to enjoy the benefits, and the individual has to wait until later to enjoy the benefits. Unemployment and maternity insurance are required to continue to pay more than one year and re-insurance to enjoy the benefits.