No more than 4 hours to show the record of the reasons are as follows:

1, because the software system error, so the display error. The software update will be slow, the software system may also be paralyzed and crashed, it is possible to show on the trip card has not been to the place;

2, the cell phone gps positioning error, the trip card also changed. The itinerary card is in the phone, and the software will automatically read the phone's gps positioning system, there is such a problem, may also be because of the phone's gps positioning error, resulting in the software automatically read the location is wrong.

Communication big data itinerary card analyzes the cell phone signaling data, through the user's cell phone is located in the base station location to obtain, signaling data collection, transmission and processing automation, with strict security and privacy protection mechanism, query results in real time available, convenient and fast. The data of communication big data itinerary card can be common in the whole country, truly achieving comprehensive coverage of the whole country with one network, and it can also be inquired into the international itinerary of my domestic cell phone number. Under the premise of ensuring user information security, these will provide scientific and accurate technical support for epidemic prevention and control, resumption of work and production, road traffic, immigration and other aspects.