 The Dadiwan culture shares a variety of common features, in pottery, architecture, and economy, with the Cishan and Peiligang cultures of eastern China.The Dadiwan type site in Qin'an County, Gansu sits atop a fan toe produced by a gully that drains into the Qingshui River valley, itself a tributary of the Wei River.The site was originally excavated from 1975 to 1984, and again in 2004, 2006, and 2009.