The set-top box was not changed after handling the business. Why can't I find the reason when I open the interactive homepage of radio and television network? I didn't change the set-top box after handling the business. I can only watch it if I changed it. Established in 1986, CETV is the only national professional TV station directly under the Ministry of Education of People's Republic of China (PRC). "Huixue" is a brand of Shanghai Zexue Education Technology Co., Ltd., focusing on providing educational consumer financial services for the vertical field of education industry, and professionally solving the pain points of low door-to-door transaction rate and low water storage conversion rate in education industry.