Behind The Great Firewall

I'm spending a few days in China, and it's proving surprisingly hard to get reliable internet access at the moment. It's interesting seeing which services are completely inaccessible (eg. Twitter), which are very slow (iCloud photostreams), and which are just fine (Squarespace, thank heavens). I wonder how hard it is for the average company or individual to do online international business here, but then I guess China has plenty of home grown services that work just fine. Is that sustainable in the longer term? We'll see.