Xia Dynasty: 2100 BC to 1600 BC

Though there is disagreement pertaining to the actual existence of the dynasty, there is archaeological evidence which points to its possible existence. The historian Sima Qian (145 BC to 90 BC) and the account in Chinese the Bamboo Annals date the founding of the Xia Dynasty to 4,200 years ago, but this date has not been corroborated. Most archaeologists now connect the Xia to excavations at Erlitou in central Henan province, where a bronze smelter from around 2000 BC was unearthed. Early markings from this period found on pottery and shells are thought to be ancestors of modern Chinese characters. With few clear records matching the Shang oracle bones or the Zhou bronze vessel writings, the Xia era remains poorly understood.