How to find out the intersection of time and space?

Space-time intersection means that my phone number and confirmed number stay together for more than 10 minute in an area with a range of 800M×800M in the same space-time grid, and the cumulative stay time of any number exceeds 30 hours in the last 14 days. If the number found is the time companion number, my health code will turn yellow and be marked as "time companion" by the system.

How should individuals do well in epidemic prevention?

When the staff check the overlapping tracks, do not go out, do personal protection, and wait for the staff to come to the door for flow adjustment and nucleic acid sampling.

Ventilation, hand washing and disinfection should be done frequently at home. Don't walk outdoors for a long time, especially in areas with high risk of epidemic situation.

Avoid places with closed space and poor ventilation when going out, and reduce the stay time in closed places. Be sure to wear a mask.