What are the recent new rules of Shanghai social security

The upper and lower limits of the employee social insurance contribution base have been adjusted to 21,396 yuan and 4,279 yuan, respectively. Social insurance is a social and economic system that provides income or compensation for the population that is incapacitated, temporarily out of work or has suffered losses due to health reasons. The main programs of social insurance include pension insurance, medical insurance, unemployment insurance, work injury insurance, and maternity insurance. The social insurance program is organized by the government, which forces a certain group of people to form a social insurance fund by taking a part of their income as social insurance tax (fee), and the insured can get a fixed income or compensation for loss from the fund if certain conditions are met; it is a redistributive system, and its goal is to ensure the reproduction of material and labor force and the stability of the society.