So we recently learnt from Information is Beautiful that China has quite a strict online policy. To view the full list of banned web sites and search terms, click on the image above.
Broadly speaking, most of the big social websites – Facebook, Twitter, YouTube – are all blocked. Many familiar sites, such as Wikipedia, remain but with entire sections or contentious pages disappeared by The Great Firewall. Porn is pretty much outlawed.
Data in this area is difficult to come by. ConceptDoppler.org is a good source but most of the information dates back to 2008. Censored search terms and online materials often vary from region to region. Sites are routinely blocked and then unblocked, sometimes on a weekly basis. You can check it for yourself in this Google Doc.
This is an ongoing investigation. If you have any data, or insights, or experiences of using the web in China, contact David McCandless atInformationIsBeautiful.net.