1, health code one is to report personal health, and the other is to master personal action track. For example, through the color of the health code, you can quickly identify whether a person has passed through provinces and cities with serious epidemics and whether he has directly or indirectly contacted infected people. Then, through big data analysis, you can directly lock and find possible infected people.
2. At the same time, every time you scan the code to get the relevant health code, you will also get personal travel information through big data. If it shows that other provinces have not checked, it means that the person who showed the health code has not checked the health code in other places at the current stage (that is, 14 days), and it also means that there is no travel record with a residence history in other places.