Legal analysis: communications big data itinerary card by the China Academy of Information and Communications Technology, China Telecom, China Mobile, China Unicom three basic telecommunications enterprises using cell phone "signaling data", through the user's cell phone is located in the location of the base station to obtain, for the country's 1.6 billion cell phone users free of charge to provide query services, cell phone users can be provided through the service, to check my previous day to all the cities and towns information. The mobile phone users can query the information of all the cities and towns that they have visited in the previous 14 days. The way to get is as follows:

1, search into the "State Council" small program;

2, click on the "epidemic prevention trip card";

3, enter my cell phone number to get the code to enter the verification code query;

4, the green trip card appears. p>4, appeared green trip card.

Legal basis: "The Chinese People's *** and State Law on Prevention and Control of Infectious Diseases" Article 12 All units and individuals in the field of the Chinese People's *** and State must accept the disease prevention and control agencies, medical institutions related to infectious diseases, such as investigations, tests, collection of samples, isolation and treatment and other preventive, control measures, and to truthfully provide the relevant information. Disease prevention and control institutions, medical institutions shall not disclose relevant information involving personal privacy, information.

Health administrative departments and other relevant departments, disease prevention and control institutions and medical institutions due to the illegal implementation of administrative or preventive, control measures, infringement of the legitimate rights and interests of units and individuals, the relevant units and individuals can apply for administrative reconsideration or litigation in accordance with the law.