What is the reason why the green code turns yellow?

1, may have been to high-risk areas recently, or had contact with patients in COVID-19. If this happens, the green code will turn into the yellow code, so it is necessary to isolate and observe the situation in time and do nucleic acid testing.

2. Nucleic acid detection may not be completed as required. In order to reduce the risk of transmission in COVID-19 caused by personnel mobility, the state will require key personnel in epidemic prevention and control areas to do nucleic acid testing as soon as possible, turn their health codes into yellow codes, and temporarily restrict them from going out.