Over the past 18 months there have been several news articles pointing the finger at the Chinese government over hacks on U.S government and businesses.
Most recently: China Suspected of Hacking US Defense Firms, Others — Largest Theft 'In History'
Is there any evidence indicating that the Chinese government was directly involved in either financing or directing people or groups in cyber attacks on the U.S government or businesses.
The apparent smoking gun in plenty of these articles is this excerpt from Wikileaks:
A global computer hacking effort: China’s Politburo directed the intrusion into Google’s computer systems in that country, a Chinese contact told the American Embassy in Beijing in January, one cable reported. The Google hacking was part of a coordinated campaign of computer sabotage carried out by government operatives, private security experts and Internet outlaws recruited by the Chinese government. They have broken into American government computers and those of Western allies, the Dalai Lama and American businesses since 2002, cables said.
I personally don't think this is strong enough evidence to implicate the Chinese govt., just because some guy told an embassy contact.