You can call the community phone to find out the specific situation.
There are three reasons why the health code may turn red: the first is that someone in your community is infected and the health code will turn red. The second is that you have been to high-risk areas, and the health code will turn red. The third is that in the vehicle you are riding, someone in the same car is suspected or confirmed to be infected, and the health code will turn red at this time.