A war of words between Beijing and Washington ignited last month after a U.S. computer security company said a Chinese military unit was behind a series of hacking attacks.
The firm, Mandiant, identified this Shanghai military hub as the most likely source of the hacks.
Now China says its own military websites were subjected to hundreds of thousands of cyber hacks last year.
China's Defence Ministry Spokesman Geng Yansheng says almost two-thirds of the hacking attempts came from the United States.
A high-profile anti-corruption campaign by China's next generation of leaders, who take power next week, is being outshone by the country's online community.
President-in-waiting Xi Jinping has said that if untreated, rampant corruption could spell the end of the ruling Communist Party and the Chinese state.
But an army of microbloggers and online journalists are leading the graft fight by naming and shaming corrupt officials.
The country's state-run
