[Cjk] Chinese meta information 'scrambled'

[David]

Hello everybody!

I asked this question already on the xetex list, but found nobody who 
could help.

My xetex file is written in Chinese, the rendering works fine. With one 
exception: the Chinese in the metadata is not correctly produced (see 
the pdf's title bar in the screenshot; the Chinese can be seen further 
below). I have to say that initially this actually worked, though only 
over the course of two or three compilations. What then happened, I 
don't know. It is not an evince problem, the same happens with xpdf. I 
have not done an update either.

Has anyone got an idea as to how to mend this problem? Maybe someone has 
encountered this before?

% Meta Information
\usepackage[
       unicode=true,
       colorlinks=false, pdfborder={0 0 0},
       pdftitle={博士学位论文},
       pdfsubject={Eine kurze Beschreibung, worum es geht},
       pdfauthor={my name},
       pdfkeywords={lunwen, innovation, China, SEM}
]{hyperref}


I appreciate your help: many thanks!

David


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