Since the outbreak, in order to let citizens go back to work, they reported online and generated personal QR codes through background checks. As e-certs, some people think that their health codes are green, which means they are healthy. In fact, it is just a basic function, similar to a QR code in electronic identity. Its function is not only to report personal health, but also to master your action track.
For example, enter shopping malls, supermarkets, take buses, planes, trains, etc. Your health code is scanned by the device, not looked at manually. For example, today, I came to the mall, I went to the supermarket to buy food, you went to the closet to buy clothes, and he went to buy shoes. There are hundreds of people in the shopping center. If a person is suspected to be a virus carrier, your health code may also change color, because you are in the same shopping mall.
When the health code turns red, you must panic and start to feel unlucky. You really shouldn't go to the supermarket, because you can't go out and buy anything. You have close contact with people infected with the virus. Even more frightening is that according to the information displayed in your health code, the community manager in your area will come to you.
Just like catching a thief, I'll take you to the quarantine area 14 days, and I'll pay all the expenses myself. After the quarantine is full, you will find that there is no problem and your health code will change from red to green. If you meet a carrier somewhere next time, sorry, the green light will turn red again, then you are out of luck and will be isolated again. Think about it. Fortunately, there is no epidemic in Wuyi, otherwise it will be miserable.