Language support for Adobe Digital Editions?

[silverflight8]

Hi guys. I tried recently to download and read Chinese ebooks (in epub format), and found that Adobe Digital Editions appears not to support the fonts. I've noticed earlier that even symbols like é weren't being rendered properly, but this novel is entirely rendered in question marks. I tried to look around online for solutions, but most of them are from message boards dated 2009-10 and seem to point at new updates, which isn't very helpful. I do have Asian fonts installed (I don't have a reader - this is my computer); they display correctly in other applications.

Anyone have suggestions or ideas about fixing this? Thanks in advance!