Liangzhu culture
The Liangzhu culture (; 3400–2250 BC) was the last Neolithic jade culture in the Yangtze River Delta of China. The culture was highly stratified, as jade, silk, ivory and lacquer artifacts were found exclusively in elite burials, while pottery was more commonly found in the burial plots of poorer individuals. This division of class indicates that the Liangzhu period was an early state, symbolized by the clear distinction drawn between social classes in funeral structures. A pan-regional urban center had emerged at the Liangzhu city-site and elite groups from this site presided over the local centers. The Liangzhu culture was extremely influential and its sphere of influence reached as far north as Shanxi and as far south as Guangdong. The primary Liangzhu site was perhaps among the oldest Neolithic sites in East Asia that would be considered a state society. The type site at Liangzhu was discovered in Yuhang County, Zhejiang and initially excavated by Shi Xingeng in 1936. A 2007 analysis of the DNA recovered from human remains shows high frequencies of Haplogroup O1 in Liangzhu culture linking this culture to modern Austronesian and Tai-Kadai populations. It is believed that the Liangzhu culture or other associated subtraditions are the ancestral homeland of Austronesian speakers.