[preempalver]

first two screens are in sequence, the third actually is a random page.
Pocketbook comes with different programs for different file types, Fbreader it's the default one for text files, among others.
the problem is indeed the file names, unless they add Chinese language support into the kernel you'll need to rename the file.
also please note that dictionary does not support chinese characters, maybe due to the font used by the application.