What do you mean by the upper and lower limits of social security?

The upper and lower limits of social security refer to the highest and lowest amount of social security payment base. Social security refers to social insurance, and the payment base is an important basis for calculating the social insurance premiums and social insurance benefits paid by employers and their employees. There are upper and lower limits, depending on the actual situation in each region. The upper limit of social security is the highest amount of social security contribution base, and the lower limit of social security contribution base is the lowest amount.