Zhongtiantong: Zhongtiantong is a distance education software independently developed by Zhongtianjiao. com。 It serves the column of "Tutoring by Famous Teachers" of China Daily Education Network. Zhongtiantong has an electronic whiteboard and teaching software installed inside, which is similar to QQ but more powerful than it. Teachers and students can realize on-site teaching through this software, and students can get on-site answers from teachers without leaving home. Bao Zhongtong is a teaching software specially designed for students. You can learn online video with famous teachers from all over the country.