I got the message, but the itinerary code hasn't changed.

Reason 1: There is a delay in big data statistics. The second reason: there is a blind spot in communication coverage, and the signals of base stations in the two places at the junction of administrative divisions may cross-cover, leading to the deviation of the results. Reason 3: Staying in a city for less than four hours is not recorded in big data.

Health QR code

The trip code can display the information of countries (regions) visited by users in the past 14 days and cities that stayed in China for more than 4 hours, and can be used to prove the action trajectory.

After getting the itinerary code, the itinerary card will display four colors according to my recent itinerary: green, yellow, orange and red.

Travel code, equivalent to health code, is obtained by relevant departments in cooperation with China Telecom, China Mobile and China Unicom by using the data received by the mobile phone and the location of the base station where the user's mobile phone is located.