Can Jiangsu, Zhejiang and Shanghai social security be transferred to each other

Under 40, you can transfer as long as you don't have a Shanghai hukou.

, but must first be insured in the name of the unit. The procedure is that after you take your ID card and social security card to the social insurance agency in Zhejiang to open the "old-age insurance payment voucher" and "medical insurance payment voucher" to join the insurance in Shanghai, you can submit two payment vouchers to the social insurance agency in Shanghai to apply for transfer.

If it is a girl, there is really no unit to participate in the insurance. Another way is to continue to pay social security in Zhejiang and then get married in Shanghai. Sooner or later, I will get a Shanghai hukou (as long as it is before the legal retirement age), and then I will go through the insurance transfer formalities after getting a Shanghai hukou.