QUESTION Performance problem: it's very slow to browse in GS CMS.

[simonzhang]

That will turn off all cdn in core and use local versions of jquery etc., but plugins might still have some hardcoded.

I've changed the code to use cdn services provided by some Chinese company. So problem is solve for me. Thanks again.
Just FYI, all of your Chinese users should also have this problem even with get-simple.info, I think it could be an important cause that GS haven't become popular in China.