Google announced a while ago that they are going to stop censoring the Chinese version of its search engine. Google threatened to leave the Chinese market.
One of the main reason was the attack on google from Chinese hackers. Google claims that it was directly from China.
The attack, which used a bug in the Microsoft Internet Explorer and not to forget the trojan named Hydraq is considered sophisticated. Because the level of the technical expertise and the information the hackers had was high. They knew exactly who to attack, and where to attack it.
Reuters claims that the source of the hackers had help from the inside.
"Google claims it’s still investigating the attacks, but if true, these allegations shed some light on why Google had reacted so strongly. Maybe Google’s decision to publicly call China out had been fueled by the sheer scope of the operation, which might have included the Chinese authorities, Google’s employees, and unknown hackers all working in unison.