此系统设计是为了实现基于服务器来转发多点间的文字、简单图形等信息的远程实时共享。即多个客户端共享一白板，任一客户在白板上绘制、写下或清除信息所有与同一服务器建立连接的客户都能共享。 -This system is designed to achieve the forwarding server-based real-time sharing of remote multi-point text, simple graphics and other information. That mul