The location name on the trip card stays for 14 days and then disappears on its own.

The Big Data Communications trip code is one of the information that must be checked by multiple locations to understand the travel status of the person, and it will usually be overwritten after 14 days by eliminating the previous trip records. Communication big data itinerary card is China Telecom, China Mobile, China Unicom, China Academy of Information and Communication Technology jointly launched a trip query service, can provide users with free of charge for the user's past 14 days to visit the country, region and domestic city proof.

Introduction of the itinerary card

Communication big data itinerary card, by the China Academy of Information and Communication Technology in conjunction with China Telecom, China Mobile, China Unicom, three basic telecommunications enterprises to use cell phone "signaling data", through the user's cell phone is located in the location of the base station to obtain, for the country's 1.6 billion cell phone users to provide free query services, the service can be used to check their own personal information. Cell phone users can use the service to inquire about all the cities and towns that they have visited in the previous 14 days.

From 20:30 on January 8, 2021, the trip card will no longer mark the names of cities and towns that contain medium- and high-risk areas in red, but will change to include the medium- and high-risk areas in parentheses after the name of the city, which is only as a travel reminder and is not related to health status.

March 30, 2021, the national government service platform anti-epidemic health code has been integrated with the communication big data trip card related information, can be displayed in the health code users, whether they have been to medium and high risk areas and other trip information, to help the health code a code pass.