Will people who have the news of the intersection of time and space also receive the news of the intersection of time and space?

"Time-space crossing" means that the mobile phone number and the mobile phone number of COVID-19 positive cases stay in the same signal grid (usually 800 m× 800 m) for more than a certain time. As long as there is an intersection with the trajectory of positive cases, whether it is a physical pass or a cell phone signal from the same communication base station, it may be considered as a "time-space intersection".

There is a reasonable error in capturing the information of "intersection of time and space" through big data. In order to protect the health and life safety of the general public to the maximum extent and block the spread of the epidemic in the shortest time, a short message will be sent to the mobile phone of "time and space convergence" to remind the public to carry out nucleic acid testing and health monitoring.

With the in-depth development of epidemiological investigation, the scope of "space-time intersection" will be gradually adjusted, and reminder messages will be sent at different time periods, and residents living near the trajectory of positive cases will also be reminded by SMS. I hope the public will understand and cooperate with the epidemic prevention and control work.