You can create composite fonts using any a Roman font and any of the Simplified Chinese fonts. For example, the following PostScript code defines a composite font, Times-Italic+Kai-Medium. The Times-Italic is used for the ASCII characters and Kai-Medium font is used for the Simplified Chinese characters.
/makeEUCfont { /AsianFont exch def /WestFont exch def /NewFont exch def /CIDInit /ProcSet findresource begin NewFont [ AsianFont WestFont ] beginrearrangedfont 1 usefont 1 beginbfrange <00> <7e> <00> endbfrange endrearrangedfont end } bind def /LC_Times-Roman /Times-Roman /Kai-Medium makeEUCfont