In the period of 2008 Olympics, china had blocked access to all Blogger blogs.
Here are three connectivity tests conducted by Internet users using three different nodes in China and none of them could connect to Blogspot Blogs.
Test I: Timeout while connecting to a Blogger blog from Shanghai.

Test II: No response when a blogspot site was pinged from Shanghai, China

Test III: Blogspot Website could not be accessed from Beijing, China.

Case 2
All the articles related to the “Tiananmen” Square incident(1989) were blocked.
Here are the test results conducted by Internet users.

what is "tiananmen" square incident?
In the year of 1989,about 100,000 people gathered on the "Tiananmen" square against the government's authoritarianism and voiced calls for economic change and democratic reform within the structure of the government. The movement lasted seven weeks and left many civilians dead or severely injured. The official figure is 241 dead, including soldiers, and 7,000 wounded.
Case 3
Chinese government blocked the access to YouTube in March ,2009.
In March of 2009, the Tibetan government-in-exile released a disturbing video regarding last year's riots in Lhasa on the platform of YouTube. In respond with Tibetan government’s provocative act, china blocked the access to this sensitive video soon.
what is 3.14 Riot ?
On March 14th, 2008,rioters began a rampage, beating people, smashing businesses, looting and burning. Their actions leaded to 13 innocent civilians dead and dozens of public security officers and scores of armed police were injured, 10 in serious condition. Rioters had set fire to over 300 sites, and burned down over 200 residential houses and shops.