Why did the health code turn yellow again?

The health code will turn yellow when the system detects that you are with the confirmed patient in time and space, and you belong to the time and space partner in the risk group. Whether I pass by physically or the communication signal stays in the same grid, my green health code may turn into a yellow code with warning nature. Health code yellow code personnel and those who receive SMS reminders from Chengdu Public Security Bureau and Municipal Center for Disease Control and Prevention should immediately report to the community and conduct two nucleic acid tests at the nearest medical institution or third-party testing institution within three days, with the interval between the two nucleic acid tests being more than 24 hours. The solution to the yellow code again In view of the situation that the yellow code of the health code turns yellow repeatedly, the relevant person in charge of the Provincial University Data Center explained that it turned yellow again after restoring the green code because you were also screened out in the intersection screening of another confirmed case, so it will turn yellow again. The screening of overlapping activity tracks is one-to-one, so citizens returning to the Yellow River still need to do nucleic acid testing and self-protection as required.