The trip card, known as the Communication Big Data Trip Card, is a product of the outbreak to respond to the outbreak and prevent and control the outbreak.In February 2020, it began to be used. Users can check information on all the cities they have visited in the last 14 days for free via their cell phones.

The cellphone service is based almost entirely on the services of China's three major telecom operators (Telecom, Mobile and Unicom), whose base stations basically cover the whole country. The travel card analyzes cell phone signaling data and billing data.