[osti]

Not sure where you get your info, but github definitely isn't blocked. And there is a amazon.cn, just no one uses that crap.

[mooxiu]

I am Chinese and lived in China until this year if you want to know. For github, the situation is a little complicated, you can read this: https://www.reddit.com/r/China/comments/v8fv0p/why_is_github.... For Amazon, I mean amazon.com, not amazon.cn. Also amazon.cn's services are declining, almost nothing there.