Meanwhile, cyber security experts said China is likely to once again be made as scapegoat for the hacking attacks.

"Indeed, we cannot exclude the possibility that there might be some individuals in China, who are highly skilled in cyber technology, but the computer in Heze may well have been attacked and controlled by hackers from other countries," said Wen Weiping, associate professor in the Department of Information Security of Peking University.

"China's capability in cyber security is still lagging behind that of the US, and even behind countries like Russia."

Studies have shown that many "China-based" cyber attacks were actually staged by overseas hackers and more than 127,000 attacks on computers in China came from overseas IP addresses in the first half of 2010, the Xinhua News Agency reported in December.

Given the nation's relatively weak cyber security, Chinese experts called for more support for the sector.

"It will definitely be better if we can get more research funding to improve our capability in information security," Wen said.

The US invests two or even three times as much in the sector as China does, he added.