What caused the health code to change from green code to yellow code?

The health code changed from a green code to a yellow code for the following reasons:

1. I travel across provinces and cities with my mobile phone, especially to some places with serious epidemics.

2. When the mobile phone is turned on, it passes through different provinces and cities.

3. Drive to different provinces and cities by mobile phone.

4. Mobile phone GPS positioning error, such as the positioning error at the junction of two provinces, but this situation is rare.

Extended data

Principles of the health code:

1. The backstage judges whether the activity range of the past 14 days is safe through self-reporting and according to the behavior path of self-reporting, and gives the red, yellow and green codes.

2, automatic detection, background automatic detection of mobile phone GPS positioning, according to the change of mobile phone GPS positioning, divided into red, yellow and green codes. (Every cell phone signal has a corresponding base station, so as long as it is in the place covered by the network, the signal can be tracked. )

The difference between yellow code and red team:

The yellow code indicates that it needs to be isolated within 7 days, and the yellow code indicates that it needs to be isolated within 7 days. The yellow code needs to be punched in for 7 consecutive days before it is normal and can be converted into a green code value. Red team needs to clock in for 7 consecutive days to be normal, and then it can be converted into a green code value.