Job Recruitment Website - Social security inquiry - 20 1 1 Shanghai social security base is not determined according to your own salary level. Why are there upper and lower limits? What does this mean?

20 1 1 Shanghai social security base is not determined according to your own salary level. Why are there upper and lower limits? What does this mean?

If the actual average wage is lower than the lower limit, it shall be paid according to the lower limit, and if the actual average wage is higher than the upper limit, it shall be paid according to the upper limit. If the actual average wage is between the upper limit and the lower limit, it will be paid according to the actual average wage. The upper limit is 300% of the average monthly salary of Shanghai employees in 20 10, and the lower limit is 60% of the average monthly salary of Shanghai employees in 20 10.