The company said on its blog overnight that it would no longer censor search, news and image results on Google .cn.
Users visiting Google .cn are now being redirected to an uncensored search page in simplified Chinese at Google .com.hk.
Senior vice president and chief legal officer David Drummond said the new approach was “entirely legal and will meaningfully increase access to information for people in China.”
“We very much hope that the Chinese government respects our decision, though we are well aware that it could at any time block access to our services.”
The move, which makes good on a threat made two months ago, sparked a furious response from Chinese authorities.
“This is totally wrong,” the State Council Information Office said via Xinhua.
“Google has violated its written promise it made when entering the Chinese market by stopping filtering its searching service and blaming China in insinuation for alleged hacker attacks,” it said.
"Foreign companies must abide by Chinese laws and regulations when they operate in China.”