2. Health code: The health code is based on the actual data, which can be declared online by citizens or people who have returned to work, and the personal QR code will be generated after background review. As an individual entering and leaving electronic certificate locally, the QR code can be declared once, which is universal in the whole city. The introduction of the health code aims to make the work of returning to work more accurate, scientific and orderly. On June 5438+February 10, 2020, National Health Commission, the National Medical Insurance Bureau and state administration of traditional chinese medicine jointly issued the Notice on Further Promoting the "Five Ones" Service Action of "Internet+Medical Health", explicitly requiring all localities to implement the national mutual recognition of "health codes" and communicate one code.