老池,忙吧?太长时间没看到你啦.保重.

老池计错数,我扳着手指数了几个小时.算来算去只有50年

  What's design,for what? Here have been answer that is profound and understanding easily. The result of design is clearly. For very interesting of  
discusser, I have watched for long time. The discusser is serious with some  
joking of thought.  Thank you so much for upload and expect more.