__ U.S. waves in variable Xi Jinping's visit or Tim

Mainland China President Hu Jintao during his visit in January, the United States in a joint statement confirmed that China welcomes U.S. Vice President Joe Biden (Joe Biden) to visit the mainland in 2011, after the United States welcomed Xi Jinping's visit. Biden to visit the mainland in August when accompanied Xi Jinping, how to arrange visit to the U.S. to become the focus of two high-level interaction. Beijing foreign expert, who declined to be named to the News Agency ...__ U.S. waves in variable Xi Jinping's visit or Tim