My electronic health card was blue when it was opened, and then it turned green.

That should be a bug. The data of health code system is not updated in time, which leads to the display error of citizen health code! The health code will be automatically converted when you cross the travel track in a high-risk area or stay with the infected person at the same time in COVID-19. Depending on the exposure risk, the health code will be changed to "yellow code" or "red team". The "yellow code" indicates the need for home isolation, and the "red team" indicates the need for centralized isolation. When the health code is "yellow code" or "red team",

You need to contact the local community immediately and do centralized isolation or home isolation according to local prevention and control regulations.

During the isolation period, daily health monitoring and management should be done in strict cooperation with the local authorities, and nucleic acid sampling and testing should be conducted at the specified frequency. If you feel unwell, report it in time. When you have completed the specified isolation period, and the nucleic acid test is negative and healthy, your health code will be automatically changed to "green code" after the local assessment meets the conditions for lifting the isolation.