The medical insurance card also has a number of urban service functions, which can be replaced by social security cards in various common life scenarios, such as: ID card: it can be used as a valid certificate when taking vocational qualification examination, handling social security transfer and applying for going abroad. Transportation card: bind the social security card with a mobile phone with NFC function, and you can take the bus and subway by swiping the mobile phone. Library card: In libraries in Guangzhou, Wuhan, Jinan and other places, you can borrow books with social security cards. Physical examination vaccine: taking Shenzhen as an example. If the balance of the medical insurance card reaches 4488 yuan, you can have a physical examination or vaccination in a public hospital above the second level. Ministry of Human Resources and Social Security's "Internet Plus 2020 Action Plan" also mentioned that the future social security card will realize the function of 102, which will bring us more convenience.