Shanghai foreigners pay social security base.

The enterprise takes the total monthly average salary of the enterprise in the previous year as the payment base, and the average monthly salary of employees in the above years as the payment base. The enterprise payment base shall not be lower than the sum of the individual payment bases of employees. All enterprise employees implement a unified policy of "guarantee the bottom" and "stop the head", that is, the payment base is lower than 60% of the average monthly salary of employees in the city last year, and the payment is made according to 60% of the average monthly salary of employees in the city last year; More than 300% of the average monthly salary of employees in the city last year, the excess is not included in the payment base.

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