Open the communication big data itinerary card and then take a screenshot and mark your name on the picture

First take a screenshot and then add your name in the editing function in the mobile phone gallery. That’s it, then send it to a friend.

The communication big data itinerary card is obtained by the China Academy of Information and Communications Technology and three basic telecommunications companies, China Telecom, China Mobile and China Unicom, using mobile phone "signaling data" through the location of the base station where the user's mobile phone is located. A free query service provided by 1.6 billion mobile phone users across the country. Mobile phone users can use the service to query information about all the cities and towns they have visited in the past 14 days