1. It may be that the network signal is not good, so that the health code or the normal page cannot be displayed.
2. It may be that the resolution and color matching of the mobile phone cause the health code to be grayed out.
3. The application for new mobile phone number health code may be in the gray code testing stage. According to the current status of users, the latest health risk status is displayed through the background comparison of user registration related data. I suggest you wait for transcoding and stick to punching in. As long as you meet the transcoding rules and are healthy, the system will automatically turn into a green code.
4. Your area is the hardest hit area and has been closed for management. Health code will not be issued for the time being, gray. It is recommended to check your health code after the situation is stable.
5. The grayed health code may also be caused by long-term non-use. It is recommended to exit the refresh and log in again.
6. The border of the health code is gray, indicating that the COVID-19 vaccine has not been vaccinated, and the correct color of the health code will not be displayed until the vaccination in COVID-19 is completed.