Anonymous, a loosely knit group that has attacked financial and government websites around the world, hacked into Chinese government websites last week, defacing several, media reports said.
The group used the Twitter account “Anonymous China” to publicize the attacks, posting links to data files that contained passwords and other personal information from the hacked websites. (twitter.com/#!/AnonymousChina)
“First we want to alert the Chinese government that we aren’t afraid, and we are going to show the truth and fight for justice,” Anonymous hacker “f0ws3r” told Reuters.

The hacker, who declined to provide any personal details, was contacted through Anonymous China’s Twitter page. F0ws3r said the group planned more serious attacks against Chinese websites.
“Yes, we are planning more attacks, a few at a time,” f0ws3r said, adding that the plan was to take down the “Great Firewall of China”.
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http://www.reuters.com/article/2012/04/09/net-us-china-hackers-idUSBRE83808H20120409