Where is the intersection of the same space-time trajectory displayed?

In layman's terms, for example, an infected person has been to a 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 problem of time and space. Experts said that screening "time-space companions" can find potential risk groups to the greatest extent, and include more people who are "time-space overlapping" and may be infected in key investigations, so as to truly achieve early detection and early prevention and control.

Do health monitoring. If you have symptoms such as fever, dry cough, stuffy nose, runny nose, fatigue, sore throat, and decreased sense of smell, you should go to a medical institution in time and inform the doctor. Please take personal protection during medical treatment and do not take public transportation.

Time-space coincidence of epidemic situation refers to the track coincidence with the confirmed cases of epidemic situation in COVID-19.