icewm workstation with chinese input

1) pkg_add icewm firefox scim-chewing gnome-terminal
2) edit ~/.xsession for normal user:
export LC_CTYPE=en_US.UTF-8
export XMODIFIERS=@im=scim
export GTK_IM_MODULE="scim"
scim -d&
exec dbus-launch icewm-session
3) login from xdm with normal user, then all done!
4) if using startx, then edit ~/.xinitrc instead.