What do black, purple and green of sunflower code mean?

Black represents being audited, purple belongs to high-risk personnel, and green represents verifying that there is no abnormal health condition.

Health code (sunflower code) generally has three colors, red, yellow, green, purple and orange in some places, so one * * * is five.

It is a sunflower-shaped circle, representing an APP, an APP that does not need to be downloaded and installed.