Xi, will the CDC call quarantine?

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). In layman's terms, for example, an infected person has been to a place within 14 days, and the trajectory of your 14 days intersects with him. Whether it is a physical brush or a drift in communication signals, it may be considered as a problem of time and space. For those who are judged as time and space companions, they will generally receive SMS reminders from the Public Security Bureau and the Municipal Center for Disease Control and Prevention.

For space-time companions, their health code will be given a yellow code, which needs to be dealt with in time, as shown below: after being confirmed as a space-time companion, you must first report to your community, unit or hotel; Then immediately go to the nearest nucleic acid testing institution for nucleic acid sampling under personal protection conditions, and do nucleic acid testing twice within three days, and the time for two nucleic acid testing is more than 24 hours; Personal protection should be done before the nucleic acid test results come out. If the nucleic acid test results are all negative, you can apply for transcoding with the nucleic acid test results, so that the space-time companionship is lifted.