The trip code is the communication big data trip card a code is also equivalent to the health code, is by the China Academy of Information and Communication Technology jointly with China Telecom, China Mobile, China Unicom, three basic telecommunications enterprises using the data received by the cell phone.

Acquired through the user's cell phone is located in the base station location, for the country's 1.6 billion cell phone users free query service, cell phone users can use the service, query my first 14 days to all the cities and municipalities information.