What is the social security that the school bought?

Functions of social security cards issued by schools:

At present, there is only the medical insurance function, and only the medical expenses can be reduced, and other expenses (treatment fees and injection fees) must be paid at their own expense. After graduation, the original student medical insurance card function will be automatically cancelled, and urban workers or residents will be purchased separately to enjoy medical insurance benefits. If the work unit and the school are in the same city, you can bring your ID card and social security card to the local social security center to get the password before you can activate it online. If you are not in the same city, you must reapply. Because there is no national social security network at present, if the new social security card has the UnionPay logo, it can be used as a bank card. If you need to use it, you should also bring your ID card and social security card to the bank marked on the card for activation.

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