A branch company cannot apply for social security in the Social Security Bureau without relevant tax registration certificates, so how can employees of the branch company enjoy social security benefits? Just ask the competent tax bureau, social security and other institutions where the head office and branches are located to issue them separately. The tax bureau should consult your special administrator, and the social security bureau should consult the clerk when your company pays social security. You'd better take some relevant information and seals of the company with you when you go.

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