Traditionally refers to the unverified first Chinese dynasty, dating from the early second millennium BCE and preceding the Shang dynasty. Scholars debate the validity of the claim in Zhou period texts that the Xia controlled an area in the middle Yellow River valley. No archaeologically defined culture has been discovered. The supposed date range of the Xia dynasty covers the early part of the bronze-producing Erlitou culture of Henan province and the site of Erlitou in Yanshi county, Henan province, may be Xia.——艺术与建筑索引典

Xia dynasty, Wade-Giles romanization Hsia, (c. 2070–c. 1600 bc), early Chinese dynasty mentioned in legends. According to legend, the founder was Yu, who was credited with having engineered the draining of the waters of a great flood (and who was later identified as a deified lord of the harvest). Yu allegedly made the rulership hereditary in his family, thereby founding the first imperial dynasty in China. Tradition gives the names of the dynasty’s successive 16 rulers, ending with Jie, who is said to have fallen in love with a beautiful but evil woman, who acted cruelly. Outraged, the people, so the story goes, rose in rebellion, led by Zi Lü, who tradition says founded the Shang dynasty and is known as the Tang emperor.——Britannia Academic  @en