The health code has a gray I next to the green code.

This is a special mark when making health code, and this color is used as the mark of health code.

1. I have been to the fever clinic recently, which will cause the health code to become unmarked, that is, gray.

2. The health code turns gray, which belongs to those who haven't punched in for a long time. Punch in time, and if necessary, do a nucleic acid test, which will turn into a green code.

3. It is the first time to handle the mobile phone number, and the health code is also displayed in gray.

4. The health code will not be given when the cell is in the closed control area, which may also cause the health code to become a Gray code.