China Distance Continuing Education Network. The network synchronous cooperation platform specially designed for teaching, training and conference has been supported by the National Technology Innovation Fund. Users can realize all-round interaction through the Internet, including text, video, voice, electronic whiteboard, collaborative drawing, formula editing, document sharing, synchronous video recording and so on. Adopt the latest network technology, high-quality graphics processing technology and first-class video and audio processing technology to support super-large-scale network collaborative applications. Provide a high-quality collaborative interactive experience. The system is based on the world-leading remote collaborative work platform technology, integrates instant messaging system, and applies the most advanced video and audio coding and decoding engine and network transmission processing technology. It has the characteristics of cross-network, distribution, dynamic balance, data distribution and bandwidth adaptation, and its excellent stability and reliability provide users with unprecedented interactive experience.