You can create composite fonts using one Roman font and one of the following Traditional Chinese fonts:
Ming-Light-H
Ming-Light-V
Kai-Medium-H
Kai-Medium-V
For example, the following PostScript code defines a sample composite font, Times-Italic+Kai-Medium, which uses Times-Italic for ASCII characters and Song-Medium horizontal font for Traditional Chinese characters:
/Times-Italic+Kai-Medium
13 dict begin
        	/FontName 1 index def
        	/FMapType 4 def
        	/Encoding [ 0 1 ] def
        	/WMode 0 def
        	/FontType 0 def
        	/FontMatrix [1.0 0.0 0.0 1.0 0.0 0.0] def
        	/FDepVector [
                	/Times-Italic findfont
                	/Kai-Medium-H findfont
        	] def
	currentdict
	end
	definefont pop