The trip code is updated once a day, and the data of the previous 14 days will be updated at 8:00- 10 every morning. Now, if we go out, we should check the travel code in addition to the health code. If there are records of high-risk areas in the travel code, it will affect your normal travel. Travel codes record information by people's mobile phones looking for nearby base stations, so as to get the owner's position, but as long as they pass by, they are not always recorded and displayed. Generally, it is limited to 4 hours, and the stay time exceeding 4 hours will be displayed on the itinerary code.