If the code is blue, the epidemic prevention personnel in the place can refuse to enter the place according to the specified requirements.
First, it is convenient for people to travel. By scanning the "site code", the information management of the personnel in the site is automatically carried out, and the system automatically jumps to the health status information of the "health code" without repeating the code. Second, accurate retrospective investigation. When an epidemic occurs in a local area, it can be quickly related to other people who scan the "field code" through the scan code records of confirmed cases or close contacts in COVID-19, which is convenient for relevant departments to conduct accurate retrospective investigation and avoid the spread of the epidemic.