Shanghai social security center. Social security means that no matter which company pays to the local social security center, everyone has a fixed social security account, and the money in this personal account is combined into a huge social security fund, which is used for the social security of employees and the pension payment of retirees. Therefore, Shanghai Jia Lian Social Security is paid to the social security center in Shanghai. 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.