Will. The big data communication trip code is also one of the information that must be checked by multiple locations to understand the person's travel status, and it will usually erase the previous trip record after 14 days.

In addition, the communication trip card above, in the trip code below the city's words turned red. In this regard, the official also made an explanation, November 10, 2020 from 0:00, the trip card will contain high-risk areas of the city name marked in red, only as a travel tip, not associated with the health status, the specific control policy, please follow the local joint prevention and control mechanism.

The "Communication Big Data Itinerary Card" analyzes cell phone signaling data, which is obtained from the base station where the user's cell phone is located. The collection, transmission and processing of signaling data are highly automated, and there is a very strict security and privacy protection mechanism, which provides a high degree of authenticity and accuracy.

The "Big Data Travel Card" service uses base station data, and in order to ensure continuous communication and achieve coverage without blind spots, the signals of two base stations at the intersection of administrative divisions may cross-cover, resulting in deviations in the results. In addition, if you stay in a city for less than four hours, you will not be recorded.

The "trip card" analyzes cell phone signaling data and billing data, so the premise of having trip data is that the user generates such signaling and billing data in the course of using the cell phone. When you encounter this situation, you can try to make a few more calls, or turn off the Wi-Fi connection to use the 4G traffic, no problem the next day you can check the data.