Legal analysis: Jiangsu social security payment base is Jiangsu basic medical insurance and basic old-age insurance. The upper limit of the payment base is 19335 yuan per month and the lower limit is 3368 yuan per month. The upper and lower limits of the social security payment base are usually determined according to the local full caliber in the previous year and the average wage of urban workers. Social insurance refers to a social and economic system that provides income or compensation for people who lose their ability to work, are temporarily unemployed or suffer losses due to health reasons. The main items of social insurance include endowment insurance, medical insurance, unemployment insurance, industrial injury insurance and maternity insurance.

The social insurance plan is organized by the government, forcing a certain group to use part of its income as social insurance tax to form a social insurance fund. Under certain conditions, the insured can get fixed income or loss compensation from the fund. It is a redistribution system, and its goal is to ensure the reproduction of material and labor and social stability.

Legal basis: Article 58 of People's Republic of China (PRC) Social Insurance Law. The employing unit shall handle social insurance registration for employees within 30 days from the date of employment. If the social insurance has not been registered, the social insurance agency shall verify the social insurance premium it should pay. Employees-free individual industrial and commercial households who voluntarily participate in social insurance, part-time employees who do not participate in social insurance in the employing unit and other flexible employees shall apply to the social insurance agency for social insurance registration. The state establishes a national unified personal social security number. Personal social security number is a citizen's identity number.