Google and other 20 U.S. companies were victims to a cyber attack that originated from China. This was done in an attempt to limit free speech on the web. There is also persistent blocking of websites such as Blogger, Facebook, Google, Twitter, YouTube, and Google Docs. Google decided to stop censoring content in China to comply with government regulation.
Now when users visit Google.cn, the browser will be redirected to Google.hk. Google will continue to research and develop in China, but searching on Google will be done through servers in Hong Kong and will be uncensored. The official announcement was made by Google SVP of Corporate Development and Chief Legal Officer David Drummond on the Google Blog. [Google Blog]