Here is an old post that may be helpful.

來源: 於 2007-06-21 20:53:52 [舊帖] [給我悄悄話] 本文已被閱讀：次

http://web.wenxuecity.com/BBSView.php?SubID=immigration&MsgID=307820

Scroll down to the bottom of the screen and look for the answers from "TooSad". It is a good one.