May 31, 2013: This file photo shows the building housing Unit 61398 of the Peoples Liberation Army, center top, on the outskirts of Shanghai, China. A U.S. security firm, Mandiant, said last year it traced attacks on American and other companies to the military unit in Shanghai. China on Tuesday, May 20, 2004, warned the United States was jeopardizing military ties by charging five Chinese officers with cyberspying and tried to turn the tables on Washington by calling it "the biggest attacker of China's cyberspace." (AP)
China suggested Thursday the U.S. made up evidence to back up accusations of cyber attacks of U.S. companies by Chinese military officers.