He nominally served under Duke Kang of Qi, the last ruler from the House of Jiang, but effectively ruled the state himself.
[1] Tian He asked Marquis Wu of Wei to lobby for him at the court of King An of Zhou, the nominal ruler of all China.
In 386 BC, King An officially recognized Tian He as ruler of Qi, ending more than six centuries of rule by the House of Jiang.
[1] Duke Tai's mausoleum is located near the village of Chengjiagou (程家沟) in Putong Township (普通乡) of Qingzhou, Shandong Province.
[2] Since 2008 they have been included in the tentative list of UNESCO World Heritage Sites as part of the ancient Qi capital and mausoleum complex.