What about the social security relationship after immigration?

Just close the account. You can take both out. Social insurance can only take out the part paid by individuals, not the part paid by units; You can withdraw as much as you pay the provident fund.

Surrender process: endowment insurance manual (original), passport (original and photocopy), visa (original and photocopy), and account cancellation.

Procedures for closing the account of provident fund: passport, visa, account cancellation certificate (or household register for registering account cancellation) and provident fund card (password);

I handle it or my spouse acts as an agent. If it is extracted by the spouse's agent, the identity certificate, marriage certificate, household registration book and other documents proving the relationship between the agent and the extractor and their photocopies are required (the original and photocopy are required to extract the required information).