The trip card will contain the names of cities and towns with medium and high risk areas marked in red, only as a travel tip, not associated with the health status, the display of the bar red horizontal means that your situation is better than the red code, but still not optimistic.

Communication big data trip card, commonly known as trip code. It is by the information China Institute of Information and Communication jointly with China Telecom, China Mobile, China Unicom three basic telecommunications enterprises using cell phone signaling data, through the user's cell phone is located in the base station location to obtain, for the country's 1.6 billion cell phone users free query service, cell phone users can be used through the service, query my previous 14 days to all the cities and municipalities of the information.