What is the social security adjustment base?

Social security adjustment refers to adjusting the social security payment base. Social insurance premium = payment base × payment ratio, so the change of payment base will directly affect the change of social insurance premium. The payment base is determined according to the social average monthly salary in the area where the previous year is located, and the social average monthly salary is recalculated every year, so the Social Security Bureau will adjust the social security base in July according to the social average monthly salary in the previous year.