Legal analysis: Shanghai's social security base is determined according to the workers' own wages, and the upper and lower limits of Shanghai's social insurance contribution base are adjusted to 2 1.300 yuan and 4,270 yuan respectively. The contribution ratio of Shanghai's old-age insurance is divided according to different groups of people, among which employees of government agencies, institutions, enterprises, social organizations and other units, individual industrial and commercial households with employees, foreign employees and employees who originally participated in social insurance in small towns only need to pay 8%, and the remaining 2 1% is paid by business owners such as units and individual owners.

Legal basis: People's Republic of China (PRC) Social Insurance Law.

Article 12 The employing unit shall pay the basic old-age insurance premium according to the proportion of the total wages of employees stipulated by the state and record it in the basic old-age insurance pooling fund.

Employees shall pay the basic old-age insurance premium in accordance with the proportion of wages stipulated by the state and record it in their personal accounts. Individual industrial and commercial households without employees, part-time employees who have not participated in the basic old-age insurance in the employing unit and other flexible employees who have participated in the basic old-age insurance shall pay the basic old-age insurance premiums in accordance with state regulations and record them in the basic old-age insurance pooling fund and individual accounts respectively.

Thirteenth employees of state-owned enterprises and institutions to participate in the basic old-age insurance, the basic old-age insurance premium should be paid by the government during the payment period. When the basic old-age insurance fund is insufficient to pay, the government gives subsidies.