What is the social security additional code?

Social security, the full name of social insurance, refers to the social insurance or security mechanism to help citizens face certain social risks, such as unemployment, illness, accidents, aging and death, or to protect basic living resources, such as education and medical care.

Sales, that is, how many things can be sold every day, not profits.

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