What is the intersection of time and space, but it is a green code?

The intersection of time and space is green code because it is in the same space-time grid with the confirmed patient within 14 days (usually 800 m× 800 m as the detection range), and the stay time is no more than 10 minute.

If it is defined as a space-time companion, its health code will be given a yellow code. At this time, the space-time partner should take the initiative to do two nucleic acid tests within three days (the interval must be more than 24 hours), and carry out self-health monitoring for three days (report any abnormality in time). If the results are all negative, it can automatically turn into a green code. Those who meet the transcoding conditions and fail to transcode automatically shall register with the local community (village) and street (township) with relevant certificates and apply for changing the yellow code to the green code.

Matters needing attention of space-time companion

Health code yellow code personnel and time-space associated risk personnel who have received SMS reminders from the Public Security Bureau and the Municipal Center for Disease Control and Prevention should immediately report to the community and conduct nucleic acid testing according to regulations.

Even if the result of nucleic acid test is negative, those who are judged as time-space crossing or time-space companion should continue to carry out self-health monitoring for 14 days to avoid going out.

Refer to the above? Baidu Encyclopedia-Time Companion