What is the social security base of Hangzhou 4000?

Second gear. The social security base of 4000 means that the social security payment base of employees in a social security year is 4000, which belongs to the second file. The social insurance base is determined according to the monthly average amount of all wage income of employees during June 1 to February 1 of the previous year. The social insurance payment base is an important basis for calculating the social insurance premiums paid by employers and their employees and the social insurance benefits of employees.