FILE - In this Jan. 19, 2011 file photo, President Barack Obama listens as China's President Hu Jintao speaks during a state arrival on the South Lawn of the White House in Washington. Another visited Disneyland and Hollywood. Chinese President Xi Jinping’s trip to the U.S. mid-September, 2015, is the latest in a string of visits made over the years by China’s leaders since formal diplomatic relations were established between Washington and Beijing in 1979. (AP Photo/Charles Dharapak, File)