Always in Qingdao, how does it show Wuxi City, Jiangsu Province on the itinerary card?

I have been to Wuxi City, Jiangsu Province. The communication big data itinerary card is jointly developed by China Academy of Information and Communications Technology and three basic telecommunications companies, China Telecom, China Mobile and China Unicom, using mobile phone signaling data to obtain information through the base station location of the user's mobile phone. I have been in Qingdao. The itinerary card shows Wuxi City, Jiangsu Province because I have recently visited Wuxi City, Jiangsu Province. It will automatically disappear fourteen days after returning to the local area. If the itinerary code has a star or turns yellow or red after returning from overseas, it means that you have been to an epidemic area or had close contact with patients in time and space, and you must report it to the community. During the epidemic, you must take personal protection for the safety of yourself and others.