Open the WeChat page, enter the travel code in the search box above, and click Enter. After switching to the new page, find the personal travel record query and click it, and check Agree to click Query in the pop-up window. Finally, after entering the communication travel card page, you can see the communication big data travel card.

The itinerary code is a public welfare itinerary inquiry service jointly launched by China ICT Institute, China Mobile, China Telecom and China Unicom under the guidance of the Ministry of Industry and Information Technology. I can provide users with free domestic city certificates of countries and regions I have been to in the past 14 days for 4 hours.

Rely on the base station tower. The location of each base station signal tower is fixed, and they have a clear city ownership, which belongs to Hangzhou and which belongs to Shanghai. And which base station our mobile phone accesses will be located in which city, and travel itinerary code will record where you have been.

The following contents are for reference only: Baidu Encyclopedia-How to use travel itinerary to query specific travel records?