interactive whiteboard classroom games. The virtual machine is still running normally and will not be affected. It will be used immediately after the failure is restored. At the same time, Yunxuetang has a system escape function, which can be switched to the standby system by the teacher control. At this time, the main functions of the multimedia teaching management component can be used normally, and the class will not be interrupted. In addition, the course template synchronizes backups in real time on all cloud hosts, greatly reducing the risk of data loss.. 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.