[NTG-context] Typefile with Chinese, Korean or Japanase text

I am writing a manual where I include code snippets with typefile. Some of the code snippets contain text in Japanese but don't appear in the PDF document as typefile seems to skip the Japanese characters MWE file cjk.asy ======== Label L; L = Label("\\begin{CJK}{UTF8}{gbsn}{\\CJKfamily{gbsn}여보세요 \\end{CJK}"); label(L); shipout(); main file ======= \starttext \typefile[C][]{cjk.asy} \stoptext