interactive whiteboard in english classroom. Learn the experience. Based on the technology of redirecting basic drawing instructions, the cloud classroom solution adopts optimization techniques such as efficient streaming compression algorithm, intelligent compression algorithm and image cache matching, including multiple such as graphic display output, keyboard input, user interface equipment, Dedicated channels such as cursor movement, making full use of the client and this dyeing ability, reducing the network. The IQAio GR519 is an upgraded lightweight version based on the original IQAio GR511. The original dual-cavity structure was changed to a bottom-edge structure, so that the minimalist design accommodates modern classrooms and conference rooms. With one IQProjector V2 and one IQView E3821, you can achieve flexible and intelligent classroom.