The Dawenkou culture was a Chinese Neolithic culture primarily located in the eastern province of Shandong, but also appearing in Anhui, Henan and Jiangsu. The culture existed from 4300 to 2600 BC, and co-existed with the Yangshao culture. Turquoise, jade and ivory artefacts are commonly found at Dawenkou sites. The earliest examples of alligator drums appear at Dawenkou sites. Neolithic signs, perhaps related to subsequent scripts, such as those of the Shang dynasty, have been found on Dawenkou pottery. Chronology Archaeologists commonly divide the culture into three phases: the early phase (4100–3500 BC), the middle phase (3500–3000 BC) and the late phase (3000–2600 BC). Based on the evidence from grave goods, the early phase was highly egalitarian. The phase is typified by the presence of individually designed, long-stemmed cups. Graves built with earthen ledges became increasingly common during the latter parts of the early phase. During the middle phase, grave goods began to emphasize quantity over diversity. During the late phase, wooden coffins began to appear in Dawenkou burials. The culture became increasingly stratified, as some graves contained no grave goods while others contained a large quantity of grave goods. The type site at Dawenkou, located in Tai'an, Shandong, was excavated in 1959, 1974 and 1978. Only the middle layer at Dawenkou is associated with the Dawenkou culture, as the earliest layer corresponds to the Beixin culture and the latest layer corresponds to the early Shandong variant of the Longshan culture. Political organization The term "chiefdom" seems to be appropriate in describe the political organization of the Dawenkou. A dominant kin group likely held sway over Dawenkou village sites, though power was most likely manifested through religious authority rather than coercion. Unlike the Beixin culture from which they descend, the people of the Dawenkou culture were noted for being engaged in violent conflict. Scholars suspect that they may have engaged in raids for land, crops, livestock and prestige goods. Agriculture and diet The warm and wet climate of the Dawenkou area was suitable for a variety of crops, though they primarily farmed millet at most sites. Their production of millet was quite successful and storage containers have been found that could have contained up to 2000 kg of millet, once decomposition is accounted for, have been found. For some of the southern Dawenkou sites, rice was a more important crop however, especially during the late Dawenkou period. Analysis done on