China, U.S. seek to boost confidence as Biden visits BEIJING (Reuters) - China and the United States share a responsibility for boosting global market confidence and the American economy remains fundamentally sound, the Chinese Vice President Xi Jinping told U.S. Vice President Joe Biden who is on a trust-building visit. feeds.reuters.com/~r/Reuters/PoliticsNews/~3/QKjFSaWqeQs/us-china-usa-idUSTRE77H0HA20110818