How to specify fonts depends on encode?

[Magicloud <magicloud magiclouds gmail com>]

Hi,
   I want to use sgi screen font for english (it is so pretty), and wqy 
for chinese. I specify screen-7 in .gtkrc2, which works very well for 
english. But when I display chinese, it choose a font and a size (I do 
not know how) autoly, so makes everything a mass. Can I specify the 
fonts myself?

Thanks.