How to handle two social security in one city

You can transfer to another hospital. First of all, the social security center of the original insured city handles the transfer formalities, and the local social security association issues payment vouchers for endowment insurance and medical insurance. With these two vouchers, you can go to the social security center in the transfer area to go through the transfer procedures.

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