What about non-urban social security for migrant workers in Shanghai? Newcomer, I don't know.

Without this regulation, foreigners, whether holding urban or non-urban hukou companies, can pay Shanghai urban insurance and Shanghai housing provident fund for you, but non-urban hukou needs to submit a statement to help you pay Shanghai urban insurance! Shanghai stipulates that anyone who has an urban hukou and has paid urban insurance in Shanghai must pay the Shanghai housing provident fund! I hope I can help you!

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