Archeologist Yan Lin shows the structure of newly discovered tombs of Han Dynasty (202 B.C.-220 A.D.) at Dongzhuang Village of Gaozhai Township in Huzhu Tu Autonomous County, northwest China's Qinghai Province, Nov. 7, 2013. (Xinhua/Zhang Hongxiang)

Photo taken on Nov. 7, 2013 shows lacquerwares unearthed from newly discovered tombs of Han Dynasty (202 B.C.-220 A.D.) at Dongzhuang Village of Gaozhai Township in Huzhu Tu Autonomous County, northwest China's Qinghai Province, Nov. 7, 2013. (Xinhua/Zhang Hongxiang)

Archeologist Yan Lin shows relics unearthed from newly discovered tombs of Han Dynasty (202 B.C.-220 A.D.) at Dongzhuang Village of Gaozhai Township in Huzhu Tu Autonomous County, northwest China's Qinghai Province, Nov. 7, 2013. (Xinhua/Zhang Hongxiang)