As described on the official site of the duokan lite( goo.gl/xN5iZ
(translated) )now it has pdf support for the version: Lite0717.644.1006.rtm (2011.07.16)
This week update:
Added support for PDF format.
Added support for compressed package in support of the PDF file.
Added support for multi-language menu, the menu is currently in English only, other languages, users can add their own.
Supports user-replaceable fonts.