U.S. President Barack Obama gestures as he delivers a speech at a dialogue with Chinese youth at the Shanghai Science and Technology Museum during his four-day state visit to China, Nov. 16, 2009. (Xinhua/Chen Fei)

SHANGHAI, Nov. 16 (Xinhua) -- Visiting United States President Barrack Obama said here on Monday the United States would continue to fully support the one-China policy, and would be very pleased to see the improving cross-strait relationship.