How did the epidemic data of Taiwan Province Province come from?

The epidemic data of Taiwan Province Province were collected by big data of travel cards. On February 13, 2020, China Information and Communication Research Institute, together with China Mobile, China Telecom, China Unicom and other basic telecommunications companies, developed the the State Council client small program communication big data travel card, which was officially launched. Mobile phone users can use the SMS function to check their itinerary. In the severe epidemic environment, travel cards have rapidly spread to nearly 200 million users, and the collection of travel big data is also more conducive to the work of epidemic prevention and control departments.