Is space-time staggered contact close contact?

Close contact with infected people or crossing time and space can be judged as close contact or sub-close contact.

"Time-space intersection" is a technical term of 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.