What is the intersection of time and space?

The intersection of time and space generally refers to the companions of time and space, a new term spawned by the COVID-19 epidemic. ?

It means that my phone number and the confirmed number stay in the same time and space grid (range is 800M*800M) for more than 10 minutes, and the cumulative stay time of either party’s number in the last 14 days exceeds 30 hours The numbers found above are time and space accompanying numbers.

The application of time and space intersection in the epidemic:

Time and space intersection is the same concept as another way of saying time and space companionship, which refers to being in the same time and space grid as the confirmed patient within 14 days. (Usually 800 meters * 800 meters is the detection range), and it must not stay for more than 10 minutes.

In layman’s terms, for example, if a confirmed patient has been to Fuzhou within 14 days, and your trajectory in the past 14 days has intersected with him, whether it was a physical pass by him or a drift in communication signals, All may be identified as accompanying time and space. After the system detects that you are a time and space companion with a confirmed patient, and you are a time and space companion among the risk groups, your health code will turn into a yellow code. How to convert the yellow code of Time and Space Companion to green code? Carry out a nucleic acid test as required, and the health code will return to normal after the result is negative.

Since the concept of intersection of time and space is adopted in the prevention and control of this epidemic, some citizens are included in risk management even though they have no direct close contact with confirmed cases or close contacts.