The Liuwan Tombs,located in Liuwan Village, Gaomiao Townof Ledu County, 80km from Xining, is the largest tombs of primitive China, which are well preserved. The tombs cover an area of 110,000 square meters. The re are more than 1,500 tombs with 30, 000 relics unearthed belonging to thecultures of Majiayao, Machang, Jijia, and Xindian. The buried articles are mainly production tools. Such as axe, adx, chisel, and knife, as well as pottery articles for daily use. Among the relics unearthed, the painted pottery statue is the most valuable, and has been listed as one of the state-level relics.