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Chinese Vice President Xi Jinping and Vice President Joe Biden hold t-shirts given to them by students during their visit to the International Studies Learning Center in South Gate, Calif., Friday, Feb. 17, 2012. (AP Photo/Damian Dovarganes)

China's Xi sells U.S. trade elixir, personal chemistry

China's leader-in-waiting Xi Jinping on Friday swiped away fears that his country's economic growth could stumble, and turned to courting American companies, film-makers and governors hungry for a slice of that growth on the final day of his U.S. visit.