Regular cyber attacks from US: China(2)

Additionally, Congress may push forward trade sanctions if US industries believe the threat from cyber attacks is expanding, Shen said, but adding that the possible sanctions would still not be "devastating."

Da Wei, an American studies expert at the China Institute of Contemporary International Relations, echoed Shen, saying that compared with potential retaliatory measures, China should be more cautious of changes in the US' cyber security strategy.

The US has reportedly been mulling preemptive cyber strikes.

The Mandiant report has also stirred up controversy regarding its real purpose. The AP pointed out on Wednesday that the firm has an "obvious commercial interest in releasing the information," noting that Obama just signed an executive order aimed at improving government cooperation with industry.

Meanwhile, the background of Mandiant's founder Kevin Mandia, a retired US Air Force officer who used to work as a computer security officer at the Pentagon, also raised doubts over the motives of the revelation.

This is not the first time the US has labeled China a significant threat to its cyber security. Earlier this month, several US media claimed they were the victims of Chinese cyber attacks. A Chinese college teacher has also been named as a veteran hacker by the US media.

"The US is raising the profile of the 'invisible' cyber threat as a new weapon in order to balance its losses in the Asia-Pacific pivot strategy," said Han Xudong, a professor with the PLA National Defense University. "The US controls the world's main servers. This has been a threat to China's cyber security."

Earlier, the People's Daily said that allegations from the US are an excuse for Washington to expand its cyber security forces and levy more technology restrictions on China as a containing measure.

Geng said China has established bilateral law enforcement cooperation with over 30 nations and regions, including the US, Germany and Russia.

"China should strive for a greater say in laying out international rules on cyber security," Da told the Global Times on Wednesday, suggesting that in response to continuous accusations, China, also a big victim of cyber attacks, can "fight" back with concrete evidence.