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The post was normally given to a member of the Chu king's family and records show that only two Chu prime ministers were not related to the Chu king. They were Peng Zhongshuang (), a civilian from the Shen state, at the time of King Wen of Chu (reigned 689 – 677 BCE) and the Wei general Wu Qi during the reign of King Dao of Chu (reigned 401 – 381 BCE).