How does health code intelligence work? What do the three colors of the health code mean?

Everyone may have discovered that the health code is so smart. It knows where you have been, and you can’t hide it at all? So why are the health codes in our mobile phones so smart?

1. What is the scientific working principle of the health code?

The health code is based on the resident ID card. It records the location information related to the ID card, consumption process, bus and plane records, scanning on-site code and filled-in information. With data analysis, you can know exactly where you are? So how does it know your location? Let’s analyze them one by one.

1 If your mobile phone has location information turned on, the navigation satellite will accurately determine your location;

2 As long as you have a mobile phone card in your mobile phone, you must contact the mobile phone base station in real time Communicate and know where you are through the mobile phone base station number? This is stricter than the stroke code requirements. As long as you stay in a certain area for four hours, the trip code will record that you have been there. Your location information in the health code will be recorded as soon as you come to my place;

3 When your mobile phone uses WiFi to access the Internet, your location information will be recorded based on WiFi;

4 When you make purchases in shopping malls, shops, or restaurants, as long as you use mobile payment or bank card payment, big data will immediately record your location. Because the health code is basically an ID card, so if you swipe someone else's bank card, It shows that the owner of the bank card has spent money here, rather than showing that you have spent money here;

5 Use your ID card to buy tickets or take a bus, train or plane, and the health code can also record your location and movement track . If people with the same movement track or location as you in the same time period are infected or suspected of being infected, big data will change the color of the health codes of all relevant people.

So, the health code does not prove your health status. It shows whether you have been to dangerous areas, or have had location or spatial contact with infected or suspected infected people. It can only Proving where you have been does not prove that you have been exposed to danger or have been infected.

2. The meanings of the three colors of the health code:

The green code means that you currently have no symptoms of infection, are healthy, can stay, and can return to work and school; A yellow code means that you have had non-close contact with a confirmed person, or have been in close contact at the same time. If you check in healthily in a safe area for seven consecutive days, the health code will change from yellow to green; red code means confirmed patients, suspected patients, and asymptomatic Infected persons, people in close contact with confirmed patients, and medical observation personnel are all in red code status. In a healthy state, the red code can be converted into a green code only if the health check-in is continued in the safe area for 14 days. If a person holding a yellow or red code arrives and lives in a low-risk area, the time of arrival will be automatically recorded as long as he turns on his mobile phone. If he does not become a close contact or a case within 14 days of quarantine, he will open the health code to check in every day. After 14 days, the health code will automatically turn green. Remember the "green code to travel" and "red code to yellow" quarantine.