What is the yellow code of mobile phone?

The phone may turn yellow because you went to a high-risk area, or a confirmed or suspected case went to your place at the same time. So in order to prevent the epidemic, your health code will turn yellow.

No matter what your situation is, you need to go to the nucleic acid collection point for nucleic acid testing. Try to avoid taking public transport and report the situation to the community before the health code turns green. After the nucleic acid collection is completed, it needs to be isolated at home. Don't go out until the health code turns green.

From "green code" to "yellow code":

"Green code" personnel found fever symptoms after temperature measurement, and turned to "yellow code". For residents in high and medium risk areas, the health code will automatically change to the corresponding color from the date when the area is designated as high and medium risk area. After the risk area is downgraded, the color of the health code will also change. Green code holders only need to stay 1 hour after entering high and medium risk areas.

And the mobile phone can receive communication roaming information when it is turned on, and the health code will automatically change color. The yellow code is a reminder to people at risk of epidemic in COVID-19, so you don't have to be overly nervous. You only need to go to the nearest temporary sampling point (or medical institution) to detect nucleic acid as soon as possible to reduce unnecessary going out. When the nucleic acid test result is negative, the health code will return to the green code.