I changed flights in Shanghai earlier this month and stayed at Pudong Airport for several hours. Signs stated the airport provided free WIFI Internet connection. Connecting is relatively simple. After I entered my cellphone number as prompted, I received an SMS text message with a passcode. I entered the passcode and was able to connect to their WIFI network.
However, when I actually tried to access rolia.net, I was not able to get through. Obviously, the Great Firewall of China was working effectively at the international boarding zone of that airport. I tried to access my email account, and could not get through either. I tried to access Google Maps, same bad luck. Facebook? No way.
After many attempts, I realized that none of my online services were reachable. I wasn't able to do anything meaningful there, so I decided to give up and play some fun videos on YouTube. No way. YouTube was also blocked. No fun thing.
I felt it was really strange that I was able to connect to WIFI but could not actually access the Internet.
To summarize, the following websites/services were totally blocked at Shanghai Pudong Airport:
rolia.net
GMail
Google Search
Google Maps
Google Calendar
Google News
YouTube
Facebook