Foshan broke off social security management

As long as you are old enough to apply for old-age insurance and have been insured for at least 15 years, you can interrupt and hand in your insurance for renewal. If you resign, Foshan unit will stop your insurance. Go to the local social security bureau and ask them to issue a stop insurance. Remember to stamp the official seal. If you find a suitable job in Shenzhen, Shenzhen company will help you get insurance. After you get the social security card, go to the social security department in Shenzhen and transfer your insurance or money from Foshan to your social security account in Shenzhen.

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