I believe my problem is not due to the Font setting in FBreader. As I have mentioned, I could read Chinese ebook using FBreader when the OS was still Chinook,by that time, I had already adjusted the font setting. I do the same after installed the new OS. But it is still not OK.
I have Chinese pdf files too and I could read it with built-in pdf reader (of course, with Maemo CJK installed too) under Chinook. But now, I cannot do so, i.e. it is not only FBreader that cannot find my installed Chinese fonts.
Anyone who can really read Chinese stuffs with other applications, other than using the internal browser ?