[Aperocky]

You'd be surprised, but GFW is a blacklist not a whitelist, as such the blocked domains and/or IPs are a very small subset of all public addresses out there.

[kijin]

Even with a blacklist, a large and contiguous range like 11.0.0.0/8 won't be particularly difficult to block or reroute.

[moonchild]

I'd imagine that, with the advent of ipv6, it would have to be.