What if someone else uses the travel itinerary code and is told to shut it down?

Verify the authenticity of the incoming call number. Communication big data travel card, commonly known as "travel code". The itinerary code is used by others to verify the authenticity of the calling number. China Telecom, China Mobile and China Unicom are joined by Information China Information and Communication Research Institute to provide free inquiry service for 654.38+600 million mobile phone users nationwide through the location of the base station where the users' mobile phones are located. It was launched on March 6, 2020. Through this service, mobile phone users can query all the city information they have been to in the previous 14 days.