Is social security universal in Shenzhen?

This is national. According to official website of Shenzhen Social Security Bureau, the state requires that social security cards issued by all localities must meet the requirements of safety, integrity and public welfare, and adopt unified national standards and norms to ensure their use throughout the country, so Shenzhen social security is universal. Social security, that is, social insurance, refers to a social security system organized and implemented by the state or local government.