FILE--U.S. President Richard Nixon, right, and Chinese Premier Chou En-lai eat a banquet in Shanghai, in this Feb. 28, 1972 file photo. On Thursday, Feb. 30 years to the day after Nixon's arrival for a historic visit to China on Feb. 21, 1972, George W. Bush returns to Beijing as president, landing at an airport where advertising for Western mobile phones and designer clothes have replaced revolutionary slogans. (AP Photo/stf)