Emacs magit chinese file name displayed as as /320/320/322 in Windows?

Question

My magit use git with cygwin, and my default coding is gbk. I tried to modify the .git/config, but not work.

   [core]
        quotepath = false  
    [gui]
        encoding = gbk
    [i18n]
        commitencoding = gbk
        logoutputencoding = gbk
    [svn]
        pathnameencoding = gbk

Some one said set this in /etc/profile, not work too.

export LESSCHARSET=utf-8

So where shall I fix this problem, the .emacs, enviroment variables or .git/config?