Duke Jian of Qi (Chinese: 齊簡公; pinyin: Qí Jiǎn Gōng), personal name Lü Ren, was duke of the Qi state from 484 BC to 481 BC.
Duke Jian made his trusted official Kan Zhi (闞止), a native of the neighbouring State of Lu, his prime minister.
In 481 BC Kan Zhi plotted to attack and expel the powerful Tian clan from Qi, but the Tians learned of his plan and staged a preemptive coup d'etat.
Kan Zhi was killed first, and Duke Jian escaped the capital but was captured in Shuzhou (in present-day Teng County, Shandong) and killed on the 24th day of the fifth month.
[1][2] Tian Heng, the leader of the Tian clan, subsequently installed Duke Jian's younger brother Ao on the throne, to be known as Duke Ping of Qi.