Shanghai social security card is used as a medical insurance card.

The medical insurance card only has its own money. The operation method of medical insurance is: take the year as the settlement unit. When you see a doctor in the middle of each year, you should use the money in your card first, and when the money in your card is used up, you will start to pay in your own cash (there is a payment standard every year, if this year's payment standard is 1500 yuan), then when your cash has reached 1500 yuan, the future medical expenses will be 55 points, that is, 50% for yourself and 50% for medical insurance. There are also medical expenses for hospitalization, which are also shared by individuals and medical insurance according to certain standards. The other is medical insurance for critical illness. So that's how the money paid by the unit is used. Detailed standards can be found on Shanghai Medical Insurance Online. You can do something. I don't feel anything when I am young and healthy, but I may know this better when I am old and sick.

The second floor is more detailed.

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