How to change social security card from silver card to gold card?

Legal analysis: the method of changing the social security card from a silver card to a gold card: working in an enterprise in the core city or working in a government agency, and the people belonging to the city are also bought by the city, which is also a gold card. The difference between a gold card and a silver card is that a gold card refers to an insured person who participates in comprehensive medical insurance, while a silver card refers to an insured person who participates in basic medical insurance for hospitalization.

Legal basis: Article 58 of the Social Insurance Law of People's Republic of China (PRC) stipulates that the employer shall apply to the social insurance agency for social insurance registration for employees within 30 days from the date of employment. If the social insurance has not been registered, the social insurance agency shall verify the social insurance premium it should pay. Employees-free individual industrial and commercial households who voluntarily participate in social insurance, part-time employees who do not participate in social insurance in the employing unit and other flexible employees shall apply to the social insurance agency for social insurance registration. The state establishes a national unified personal social security number. Personal social security number is a citizen's identity number.