Duke Kang of Qi
Duke Kang of Qi, personal name Lü Dai, was duke of the Qi state from 404 BC to 386 BC. He was the final Qi ruler from the Jiang clan. The throne of Qi was thereafter usurped by the Tian clan, thus ending the Jiang Qi dynasty and establishing the Tian Qi dynasty.
Reign
Duke Kang succeeded his father, Duke Xuan of Qi, who died in 405 BC after 51 years of reign as titular ruler of Qi. Since Tian Heng killed Duke Xuan's uncle Duke Jian of Qi in 481 BC, the leaders of the Tian clan had been the de facto rulers of Qi.Tian He was leader of the Tian clan during Duke Kang's reign. With the lobbying of Marquis Wu of Wei, in 386 BC King An of Zhou, the nominal ruler of all China, officially recognized Tian He as ruler of Qi, ending more than six centuries of rule by the House of Jiang. Tian He became the first de jure ruler of Qi from the House of Tian, and is posthumously known as Duke Tai of Tian Qi.
After Tian He ascended the throne of Qi, he exiled Duke Kang to Zhifu Island in present-day Shandong Province, where he lived for seven more years and died in 379 BC.