Can I set the path for saving my Gnus files?

[Water Lin]

By default, the Gnus puts the files under ~/News & ~/Mail, also puts
some files under ~/.

I don't think this will be convenient for me to sync these data between
my computers, one at office and one at home. So I try to put all of them
into a folder.

How can I set this? 

Thanks

Water Lin

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