Why is the social security base of recent graduates higher than their salary?

The base of social security payment is generally determined according to the monthly average of all wages of employees in the previous year. However, if the employee's salary standard is lower than the local social minimum wage standard, the social security payment base shall be based on the social minimum wage.

The salary of fresh graduates may be relatively low, lower than the local social salary, so there may be cases where the social security payment base is higher than their own salary.