In the company to make a remote real-time interactive teaching system, the other is to say, but there is a module is a function of similar Shared white board, is authorizes the teacher students can operate the teacher of the whiteboard, teachers can also operating the teacher Shared white board, can write on a whiteboard drawing, etc., in a whiteboard to write the contents of the other party can see in real time, would you please tell me what the good function of the implementation approach, bow down!