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U.S. President Barack Obama(C) arrives at the Shanghai Science and Technology Museum to deliver a speech at a dialogue with Chinese youth during his four-day visit to China, Nov. 16, 2009. (Xinhua/Pei Xin)

Yang Yuliang(C), president of Fudan University, speaks before U.S. President Barack Obama(L) delivers a speech at a dialogue with Chinese youth at the Shanghai Science and Technology Museum, Nov. 16, 2009.(Xinhua/Pei Xin)