How many digits is the Changshu social security number?

The Changshu social security number is seven digits.

1. Social insurance is a social and economic system that provides income or compensation to a population that is incapacitated, temporarily out of work, or has suffered a loss due to health reasons. The main items of social insurance include pension insurance, medical insurance, unemployment insurance, work injury insurance, and maternity insurance.

2. The social insurance scheme is organized by the government, which forces a certain group of people to take a part of their income as social insurance tax (fee) to form a social insurance fund, and the insured people can get fixed income or compensation for loss from the fund under the condition that certain conditions are met, which is a kind of redistributive system, and its goal is to ensure the reproduction of material and labor force and the stability of the society.