You  can use emacs to edit documents containing Chinese
characters. Such a file can be loaded with: 
  C-x RET c cn-gb RET C-x C-f present.tex
 
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You can also embed in the file that the encoding to use is
cn-gb with the following at the top:
Or the following line in the 
Local Variables: section at the
bottom of the file:
  %%% Local Variables: 
  %%% mode: latex
  %%% TeX-master: t
  %%% coding: cn-gb
  %%% End: 
 
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To insert a Chinese character:
Then simply 
C-\ to toggle the keyboard entry mode.
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