Send a text message to the operator. Telecom, mobile, Unicom three basic telecommunications operators in accordance with the needs of epidemic prevention and control, in the case of user authorization, based on big data analysis, to provide users with my epidemic prevention and control of travel query service, urban areas no epidemic below the county how to determine that have not been sent a text message to the operator can be. The Ministry of Industry and Information Technology Information and Communication Management Bureau Director Han Xia said that with the arrival of the enterprise resumption of work and the peak of the return trip, this service can be used to assist in proving whether you leave the city or return from a different place. The service is free for operators.