The Wu dynasty 吳 (222-280) ruled over one of the Three Kingdoms 三國 (220~280). It was founded by Sun Quan 孫權 (the "Great Emperor" 吳大帝, r. 222-252). The dynasty is also called Sun-Wu 孫吳 in order to avoid confusion with the Zhou period 周 (11th. cent.-221 BC) feudal state of Wu 吳 or the small empire of Wu 吳 (902-937), one of the Ten Kingdoms 十國 (902-979). Source: XX 楊德炳 (1992). "XXX", in: Zhongguo da baike quanshu 中國大百科全書, Zhongguo lishi 中國歷史, vol. 2, pp. XXX. Beijing/Shanghai: Zhongguo da baike quanshu chubanshe.