Xi Jinping

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U.S. Vice President Joe Biden, center, meets with Chinese President Xi Jinping inside the Great Hall of the People on Wednesday, Dec. 4, 2013, in Beijing, China. Biden and Xi discussed efforts to forge a new model for relations between the major powers, but they've made no public comments about a new Chinese air defense zone that's become a major friction point in Asia. (AP Photo/Lintao Zhang, Pool)