The principle of mobile phone positioning is to determine the location of the mobile phone by measuring the distance of the mobile phone through the base station. The accuracy of this positioning method depends largely on the distribution of base stations and the size of coverage. The "Traffic Big Data Travel Card" is green, indicating that it has not been to or passed through an epidemic-prone area within 14 days.
It should be noted that the color card only reminds the place to visit, and has nothing to do with health status. The health status still displays the Bamin health code, and the green code indicates that there is no abnormality in the health status verification. It is reported that the "Communication Big Data Travel Card" service is jointly provided by China Communication Research Institute, China Telecom, China Mobile and China Unicom.
Extended data:
The travel trajectory is introduced as follows:
In case of color display error, itinerary inquiry or itinerary query, users can call their operator's customer service hotlines (telecom 10000, mobile 10086, Unicom 100 10) for consultation.
The user's number can be used to evaluate whether the close contact population appears in high-risk areas, and also to evaluate the user's location and how far it is from the nearest epidemic community. In addition to telecom mobile phone users, mobile phone users and Unicom mobile phone users can also query personal activity tracks.
Xinhuanet-Ensure the seamless connection of epidemic prevention and control. Zhengzhou airport regional trajectory and itinerary query QR code.
Xinhuanet-Minwutong APP can query the travel trajectory of the past 14 days.