By Mike Mount

March 04, CNN

WASHINGTON - The Chinese military continues to increase spending on efforts to break into U.S. military computer systems, expand its Navy, and invest in intercontinental nuclear missiles and weapons to destroy satellites, according to the latest U.S report on China's military power.

The annual report from the Pentagon to Congress says China's total military spending in 2007 was between $97 billion and $139 billion, but it is hard to tell exactly how much was spent and on what.

In comparison, the U.S. military budget request for 2008 is $481.4 billion, not including war requests.

Pentagon officials said a chunk of China's spending went to cyberwarfare, because 2007 saw several "intrusions" believed to be from the Peoples Liberation Army. In the incidents, unclassified U.S. military computer systems were broken into and information was taken, according to Pentagon officials.

While the information taken was not classified, Pentagon officials said the worry is the Chinese hacking required many of the skills and capabilities that would also be required for a computer network attack.

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photo: Chinese military officers after a meeting about the People's Liberation Army in 2007 (Getty Images)