1.7.1-1: In cmd.exe shell, how to pass multi-byte characters to bash?

[bootleq]

When typing command in Windows XP cmd.exe shell, with multi-byte
characters, for example:
bash -c 'echo Ａ'
result in:
bash: $'echo \357\274\241': command not found
expected result:
Ａ

This would be problematic when writing Windows scripts to invoke bash commands.

How should I solve this?
Thank you very much.
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