What is the first time to buy social security?

The purchase of enterprise social security is generally handled by the unit. When employees apply for social security for the first time, they only need to provide their original resident ID card, and then the social security personnel in charge of the unit will carry other materials (such as the original company social security certificate, company account opening permit and other local requirements) to apply for social security according to the local social security process;

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