The Ministry of Industry and Information Technology (MIIT) can check trip big data.

Communication big data itinerary card is by the China Academy of Information and Communication Technology in conjunction with China Telecom, China Mobile, China Unicom, three basic telecommunications enterprises to use communication big data for China's cell phone users to provide free query service, cell phone users can use the service, query the information of all the cities and municipalities that I have been to in the previous 14 days. As of March 25, 2020, the cumulative query volume has exceeded 450 million times.