It's a sad day for all Google users in China since the site's search operations have been shut down completely and Google.cn now seems to be redirecting towards Google.com.hk
This doesn't come as a surprise since Google had been having quite a few problems with the Chinese government, specially after the cyber attack on Google in December which is considered to be an inside job.
Here is an update from the official Google blog:
So earlier today we stopped censoring our search services—Google Search, Google News, and Google Images—on Google.cn. Users visiting Google.cn are now being redirected to Google.com.hk, where we are offering uncensored search in simplified Chinese, specifically designed for users in mainland China and delivered via our servers in Hong Kong. Users in Hong Kong will continue to receive their existing uncensored, traditional Chinese service, also from Google.com.hk. Due to the increased load on our Hong Kong servers and the complicated nature of these changes, users may see some slowdown in service or find some products temporarily inaccessible as we switch everything over.
As of now, all users accessing the web, news and image search are being redirected to the Hong Kong site while music search and maps will remain live for now.