This isn't a problem of no font, all text has a font assigned, but rather that the font in question does not have the correct glyphs. You can solve this using Find/Change to look for text formatted with your font (if I remember, you are using Arno Pro) and the Unicode range of the missing glyphs, which you add as a class in a GREP query, if my memory is correct, then change to your character style that should assign a font that does contain the required glyphs.
I don't know the correct range, but I do know this has been covered here more than once, and one good palce to start would be http://forums.adobe.com/message/3728352#3728352
You can do a forum search for Chinese Unicode to find other potetially relevant threads.
The script is awesome!