How did the village Committee know that I came back from other places?

People who come back from low-risk areas will be notified by the village to report when you come back. The first thing is to do nucleic acid testing, because now all villages are in epidemic period, and the returnees are tracked and controlled. These are all known by the big data platform, even if you know it as soon as you come back. If you come back from a high-risk area, you may not even be able to go back to the village, so you will be taken to centralized isolation!