US 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, November 16, 2009. [Xinhua]

Yang Yuliang(C), president of Fudan University, speaks before US President Barack Obama (L) delivers a speech at a dialogue with Chinese youth at the Shanghai Science and Technology Museum, November 16, 2009. [Xinhua]