Different environment variable between server and fabric2.4

[YesOhh]

When i input 'locale' in a server, i get the following result:
LANG=zh_CN.UTF-8
......
......

But when i use fabric like this:

    from fabric import Connection, Config
    config = Config(overrides={'sudo':{'password': 'xxxxxxxx'}})
    c = Connection(f'xxxx@xx.xx.xx.xx', connect_kwargs={'password':'xxxxxxxx'}, config=config)
    c.run('locale')

Result like this:
LANG=en_US
......
......

How can i change the fabric's environment variable?
I can't find a method in the document. Anyone can help me?
Thank You!

[honglei]

Try fabric2, I got corrent result:

LANG=zh_CN.UTF-8
LC_CTYPE="zh_CN.UTF-8"
LC_NUMERIC="zh_CN.UTF-8"
LC_TIME="zh_CN.UTF-8"
LC_COLLATE="zh_CN.UTF-8"
LC_MONETARY="zh_CN.UTF-8"
LC_MESSAGES="zh_CN.UTF-8"
LC_PAPER="zh_CN.UTF-8"
LC_NAME="zh_CN.UTF-8"
LC_ADDRESS="zh_CN.UTF-8"
LC_TELEPHONE="zh_CN.UTF-8"
LC_MEASUREMENT="zh_CN.UTF-8"
LC_IDENTIFICATION="zh_CN.UTF-8"
LC_ALL=