说明：  橙光电子白板系统是一款轻便的屏幕注释系统，一次安装即可实现屏幕注释，随机抽号功能，比原厂白板系统更简便，更好用，欢迎下载体验
(Orange Optoelectronic Whiteboard System is a portable screen annotation system. Once installed, it can realize screen annotation and Random Numbering function. It is simpler and more useful than the original whiteboard system. Welcome to download the experience.)