SHANGHAI, Nov.16 (Xinhua) -- U.S. President Barack Obama said here Monday the United States has a positive, constructive and comprehensive relationship with China.

    Obama made the remarks during a dialogue with Chinese youth in China's economic hub Shanghai.

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.

"Today we have a positive, constructive and comprehensive relationship that opens the door to partnership on the key global issues of our time: economic revocery, development of clean energy, stopping the spread of nuclear weapons and the surge of climate change, the promotion of peace and security in Asia and around theglobe," he said.

    Obama arrived in Shanghai late on Sunday and met city officials Monday morning before his meeting with young Chinese.

    He will head to Beijing Monday afternoon.