The Longshan (or Lung-shan) culture, also sometimes referred to as the Black Pottery Culture, was a late Neolithic culture in the middle and lower Yellow River valley areas of northern China from about 3000 to 1900 BC. The first archaeological find of this culture took place at the Chengziya Archaeological Site in 1928, with the first excavations in 1930 and 1931. The culture is named after the nearby modern town of Longshan (lit. "Dragon Mountain") in Zhangqiu, Shandong. The culture was noted for its highly polished black pottery (or egg-shell pottery). The population expanded dramatically during the 3rd millennium BC, with many settlements having rammed earth walls. It decreased in most areas around 2000 BC until the central area evolved into the Bronze Age Erlitou culture. The Longshan