Time-space intersection generally refers to time-space concomitant, a new term spawned by the new crown epidemic. Refers to my phone number and the diagnosis of the number in the same space-time grid (the range is 800M * 800M) *** with the stay more than 10 minutes, and the last 14 days of either side of the number of the cumulative length of stay of more than 30 hours or more, the detection of the number of space-time accompanied by the number. Spatio-temporal intersection is the same concept as another term spatio-temporal concomitant, which means that within 14 days, with the diagnosed patient in the same time and space grid (the range is usually 800M*800M as the detection range), *** with the same stay for more than 10 minutes.