Yahoo has not answered the FCCC's questions about the attacks, nor has it told individual mail users how the accounts were accessed," a spokesman told the news agency.
The censorship in China made the recent headlines when there is a cyberattck on human right activists in China. However, Chinese govt vehemently denied the allegation about possible cyberattack on human right activists. But, this is well known fact that China strict controls the content about pornography and sensitive political material. Although, Google recently blamed China for the attack, the company was not sure whether it was a technical issue or a deliberate act. The issue has now been resolved.
source : http://blog.taragana.com/index.php/archive/yahoos-email-account-in-china-got-hacked/