What do you mean by crossing time and space?

The intersection of time and space is actually the companionship of time and space.

1. Time-space intersection "is the same as" time-space companionship ",which refers to the person who stays with the diagnosed patient for 14 days in the same time-space grid (usually 800 m× 800 m as the detection range).

2. In layman's terms, for example, an infected person has been to a certain place within 14 days, and the trajectory of your 14 days intersects with him. Whether it is a physical brush or a drift in communication signals, it may be considered as a space-time companion.

Not yet.

1. "Time-space intersection" is a professional term used by public security and telecommunications departments. Space-time intersection and space-time accompaniment are the same concept, which means staying in the same space-time grid (800 m× 800 m) with the diagnosed patient within 14 days 10 minutes. In layman's terms, it is crossed with the travel trajectory of the confirmed patient 14 days. No matter whether the communication signal drifts or passes by, it may be considered as a time-space intersection crowd.

2. The health code will turn yellow after being judged by the system as time-space crossing. For this kind of personnel, it is necessary to carry out nucleic acid detection twice every three days. After all nucleic acid test results are negative, the green code will be restored. If it is only the intersection of time and space, there is generally no need for isolation.