The keyboard information for the Simplified Chinese Keyboard (Code Set IBM-eucUCS) can be viewed in the /usr/lpp/X11/defaults/xmodmap/zh_CN/keyboard.template file.
If you are running with the ZH_CN locale (UTF-8 codeset), this keyboard information is located in the /usr/lpp/X11/defaults/xmodmap/ZH_CN/keyboard.template file.