The Erlitou culture was an early Bronze Age society and archaeological culture. It existed in the Yellow River valley from approximately 1900 to 1500 BC. The culture is named after Erlitou, an archaeological site in Yanshi, Henan. It was widely spread throughout Henan and Shanxi and later appeared in Shaanxi and Hubei. Most archaeologists consider Erlitou the first state-level society in China. Chinese archaeologists generally identify the Erlitou culture as the site of the Xia dynasty, but there is no firm evidence, such as writing, to substantiate such a linkage, as the earliest evidence of Chinese writing dates to the Late Shang period.
Bronze ceremonial axe (yuè 鉞) with pattern of crosses inlaid in turquoise, dated between 1800 and 1500 BC