What's the social security number?

Social insurance number, referred to as social security number for short, is a lifelong personal insurance number established by the social insurance agency when the insured person registers.

The insured person can consult the human resources management department of the employer, and the handling personnel of the employer can inquire through the social insurance declaration system (municipal human resources and social security network);

If a social security card has been issued, I can bring my valid ID card to the counter of any service outlet of the social security card issuing bank for enquiry; If the social security card has not been issued, you can also hold your valid ID card to inquire about the social insurance agency in the insured place.

Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.