Sorry for the reply after 16 years. You can do the trick like this: 
$ perl -lnE 'BEGIN { eof(); binmode ARGV, ":encoding(cp936)";} say' a.
+txt b.txt

[download]
Inspired by the answer here: How do I read UTF-8 with diamond operator (<>)?

In reply to Re: binmode and one-liners by kevinxie
in thread binmode and one-liners by BrowserUk

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