Is the social security 120 mark capped in Shanghai?

No, the social security is not capped on the basis of Shanghai office 120, and you can get 3 points after paying for one year. Shanghai, referred to as "Shanghai" or "Shen" for short, is a municipality directly under the Central Government of the People's Republic of China, a national central city, a megacity, a core city of Shanghai metropolitan area and China's international economy, finance and trade.