National treasure No. 1 bronze chariots and horses from northwest China's Shaanxi Province Museum of the Terra-cotta Warriors and Horses of Qinshihuang is presented in the China Pavilion in the World Expo in Shanghai, east China, on June 1, 2010. It is the first time for the No. 1 bronze chariots and horses to be presented outside Shaanxi after it was unearthed 30 years ago. (Xinhua/Ren Long)