Will time and space companions receive text messages immediately?

Generally, I will notify you by SMS. Spatio-temporal companion refers to the person who stays with the diagnosed patient for 14 days 10 minutes in the same spatio-temporal grid (usually 800 m× 800 m as the detection range).

Space-time companion is a network big data application, which is now used in the field of epidemic prevention. The principle is: through the data provided by the user's mobile phone and the communication base station, find people who exist in the same time period and in the same spatial range. They are each other's "time and space companions". During the epidemic, as long as one of them is diagnosed, closely related or sub-closely related, these time-space companions will receive time-space companion notification and health code.