Archeological workers make a sketch map at the No. 1 Pit of the Emperor Qinshihuang's Mausoleum Site Museum in Xi'an, capital of northwest China's Shaanxi Province, July 18, 2013. The 2,200-year-old mausoleum was discovered in Lintong District, 35 km east of Xi'an, in 1974 by peasants who were digging a well. The Chinese terracotta army buried around the mausoleum was one of the greatest archeological finds of modern times. (Xinhua/Bi Xiaoyang)