My previous work unit was in Xiangcheng District, Suzhou, but I am from Kunshan, and now I work in Kunshan. I want to transfer social security to Kunshan. How to turn?

Yes, social security can be moved and merged with the change of people's work unit, and it will not affect your accumulated payment period. You take your ID card and Kunshan social security card to the social security bureau of the original insured place to apply for moving out of social security and applying for a payment voucher, and then take the payment voucher back to the social security bureau of Nantong's current insured place to apply for the merger of social security accounts in different places.

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