Top US and Chinese military commanders have signed a deal to improve communications between the two forces amid ongoing disputes in the South and East China seas. US Marines Gen. Joe Dunford, chairman of the Joint Chiefs of Staff, and his Chinese counterpart, Gen. Fang Fenghui, signed the so-called joint staff dialogue mechanism Tuesday at the headquarters of the People's Liberation Army in Beijing. According to the US Department of Defense, the agreement will enable the two militaries "to communicate to reduce the risk of miscalculation. "Such communications are especially crucial now, officials said, "as the region and world are facing the dangers of a nuclear-armed North Korea."