I found in my /etc/gtk directory. There's already a gtkrc.zh_TW.Big5. I then make another symbolic link to gtkrc.zh_TW.big5. It still doesn't work. Maybe the problem is that I couldn't load xfs-xtt successfuly. After I added a line unix/localhost:7100 to my XF86Config's Files Section, X couldn't load at all. It said "Can't connect non-local host localhost"!! Strange!! I can telnet to localhost myself! Could anyone give me a clue again?