The company requires the police station to issue a certificate of social security renaming. Can I only do it myself?

If you change your name in the public security bureau, you should have your previous name on the household registration book. In this case, you don't need the proof of the public security bureau, you can change your name as long as you have a household registration book.

If your second-generation ID card changes its name due to an error entered in the Public Security Bureau system, you should ask the Public Security Bureau to issue a household registration certificate. If the local police station does not act, you can complain to your superiors.

If the name of the social security card is inconsistent with the name of the ID card because of the company's input error, then this can only be authenticated by the company.

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