According to the relevant information, the base of social security payment in Shanghai is 28 15- 14076 yuan, and the upper limit of the base of individual payment of unit employees is 14076 yuan, and the lower limit is 28 15 yuan. The unit payment base is determined by the sum of individual monthly payment bases in the unit.

Shanghai, referred to as "Shanghai" or "Shen" for short, is the largest economic center and an important international financial center city in China, and the first batch of coastal open cities. Shanghai is located in the east of China, at the mouth of the Yangtze River, facing the Pacific Ocean. By the end of 2020, the administrative division of Shanghai covers an area of 6,340.5 square kilometers, with 16 districts under its jurisdiction. Shanghai has a permanent population of 24.8709 million, with an average elevation of 2. 19 meters. Dajinshan Island used to be the highest point in Shanghai, with an altitude of103.7m, belonging to the north subtropical monsoon. Shanghai has abundant rainfall, mild and humid climate, shorter spring and autumn and longer winter and summer. In 2020, Shanghai's GDP will reach 3.87 trillion yuan, ranking sixth among cities in the world. Shanghai securities market ranks among the top three in the world in terms of financing scale, spot gold trading volume and crude oil futures market size. The total transaction volume of Shanghai's financial market reached 2,274.83 trillion yuan, and the transaction volume of many varieties ranked among the top in the world.