Work in Beijing was handed over to Shanghai Social Security.

1. If you work in Shanghai, you must pay Shanghai social security for you. If you work in Beijing, you have to pay social security in Beijing. Where you work, you must pay the local social security.

2. Under normal circumstances, it is necessary to pay a service fee to entrust a human resources company to handle social security in different places. The service fee is generally paid by the company and has nothing to do with the employees.

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