There are three health codes, green, yellow, red and green. You can get on the plane, take the subway, enter the supermarket, take the bus or train. Red team said that you were infected with the virus and needed treatment. When I need to fly back to China abroad, I need a healthy green code to get on the plane. I logged in the health password fourteen days in advance. There is a flashing shape from the first day, and I log in every day until the health code turns green after 14 days of logging in.