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Racing ahead: A bronze chariot and horses from the No 1 pit of the mausoleum of Qinshihuang, the first emperor of the Qin Dynasty, is unveiled at the Expo's China Pavilion on June 1. The national treasure, presented outside Shaanxi province for the first time since it was unearthed 30 years ago, will remain at the pavilion until the end of the Expo in late October. Photo by Ren long / Xinhua