[erlang-questions] Why are the two strings outputed in diffrent format?

[devdoer bird]

HI:

I have a utf8  encoded file y.erl:  the source is :
-module(y).
-compile(export_all).
output2()->
    "中文".


And a latin encoded file x.erl, the source is:
 -module(x).
-compile(export_all).
output2()->
    "中文".

When execute them in erlang shell,
1> x:output2().
"\326\320\271\372"
2>y:output2().
[228,184,173,229,155,189]

I don't know why they  are outupted in diffrent format, one is
string-format, the other is list-format. Why aren't they birth outputed in
string-format or both in list-format?
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