In general, the health code will only be recognized as a spatio-temporal companion if it stays in the middle and high risk area for more than 4 hours, and the spatio-temporal companion is in the same spatio-temporal grid as the confirmed patient within 14 days, usually taking 800 meters by 800 meters as the detection range, and the * * * stay time exceeds 10 minute.
If you just pass by by by car and stop for a short time, the health code will not change color, and the health code will not collect personal location information, but the travel code will remind you that you have been to the middle and high risk area.
Health regulations discoloration rules:
The first one is the contact history with confirmed cases or asymptomatic infected people in COVID-19, including close contacts, sub-close contacts and close contacts in time and space.
The so-called close contact in time and space refers to the key population who may be exposed to more than 1 hour (including delay 1 hour) at the same time, in the same place (a key place where many cases occur or a high-risk place where a single case involves a closed space) and within 250 meters around the onset of a confirmed case or asymptomatic infected person.
The second reason for the color change is that I have been to the high-risk areas of COVID-19 epidemic (including the cell phone signal under my name).
The third is that the information reported in the Health Code Times is inaccurate.
The fourth category is other people who have been included in the COVID-19 epidemic prevention and control platform for investigation and verification.