System: Harmonious System 3
Software version: WeChat 8.0. 18
The health code will change color when time and space meet. In this case, you don't have to worry too much. As long as you go to the designated place for two nucleic acid tests within 3 days, the results are negative, and the health code will be automatically converted into a green code.
Time-space companionship ",sometimes called time-space crossing, generally refers to people who stay in the same time-space grid (800 meters *800 meters) for a period of time (14 minutes or more) with patients diagnosed in COVID-19. For example, an infected person has been to a place in 14 days, and someone's trajectory has crossed with him in this 14 day, then he may be considered as a space-time companion.
Surveyors will further investigate the identified time and space companions to determine the exact way, specific time and actual distance of the time and space companions and judge the infection risk. If it has been screened clearly, it is neither a secret contact nor a sub-secret contact, then there is no risk of COVID-19 infection. Screening time and space companions can find potential infected people to the greatest extent, and include more people who may be infected with "time and space overlap" in key investigations, so as to achieve early detection and early prevention and control.