For Japanese I currently use

\startsetups [japanese]
  \setscript [nihongo]
\stopsetups
\setuplanguage [ja] [setups=japanese]

\definefallbackfamily
  [archimate]
  [ss]
  [Hiragino Sans]
  [preset=range:japanese,
   tf=style:W3,
   it=style:W3,
   bf=style:W5,
   bi=style:W5,
   force=yes]
\definefontfamily [archimate] [ss] [Optima]
\setupbodyfont[archimate]

I've been wondering what a good choice is for Chinese which is to be added to my project. Hiragino Sans GB has both Japanese and Chinese but only W3,W6

I have no knowledge of what is elegant in these fonts. Can someone advise me? No bitmap fonts.