CMU (central management unit): It mainly deals with messages. Integrate and manage messages that communicate between servers and clients. 2. IAU (Intelligent analysis unit): It mainly analyzes and processes the data of face and license plate of intelligent module, such as AI module of face recognition, license plate recognition and intelligent recognition. 3. MDU (Media Distributor unit): It mainly transmits the audio and video stream of the equipment and the intelligent analysis data to the client.