Is Shenzhen Social Security Card Universal in China?

At present, Shenzhen social security card is not universal in China. Because the current social security policy is coordinated by provinces and cities, there is no national coordination. Moreover, at present, all provinces and cities in the country can not transfer the medical insurance relationship, but only transfer the employee pension insurance (what people call social security) nationwide. The current policy is to transfer only 8% of personal accounts, not the overall part, but the total salary base paid by individuals, which is not big for personal influence, but only the increase or decrease of provinces and cities.