Do you often receive marketing calls such as loan management, insurance promotion, real estate agency, education and training?Are you worried that the elderly at home may receive unfamiliar routine phone calls?To prevent users from being harassed by unsolicited marketing calls, under the guidance of the Ministry of Industry and Information Technology, the China Academy of Information and Communications has organized three telecom operators, China Telecom, China Mobile, and China Unicom, to provide "harassing call rejection" services to users nationwide. Users can use the official account of their operators, send business messages, and handle business hall transactions for free to register their willingness to answer phone calls and prevent harassment calls...