Why is my social security unit a school?

In the past, the social security paid at school was different from that paid at the company. I wonder if you went to your present company this year. If yes, the file must be changed from student status to worker/cadre status before the company can pay social security. What month did you graduate? If it is June-July, the social security payment record of the unit may not have been uploaded.

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