Duke Yi of Wey, given name Chi, was a Zhou dynasty feudal lord and the 18th ruler of Wey. He was best known for his absurd life-style which led to a temporary fall of his state and his permanent death.
Chi was the son of Duke Hui of Wey. He succeeded his father in the year of 668 BCE. The Records of the Grand Historian and Zuo Zhuan recorded that Duke Yi was an enthusiast of crane breeding. He was so fond of this type of bird that when Di people invaded his country, he sent off cranes to fight on the battlefield in the hope of a victory over the invaders. He led the army himself and fought the Di people in the battle of Yingze. In the end, the duke was defeated.
In the winter of 660 BCE, Di people destroyed the defense of Wey army and ruined the city of Chao Ge; today's Qi county of Henan Province. Duke Yi was killed.
After Duke Yi's death, Duke Huan of Qi built a city in Chuqiu for Duke Yi's successor Duke Dai. The state's life-span was prolonged thanks to Duke Huan.
His death marked the end of Wey's existence in Chao Ge, the city which Shu Feng of Kang received from his brother Duke Zhou.
衞懿公（？ - 前660年），姬姓，名赤，中國春秋時期衞國第十八位國君。在位時好鶴，賜給鶴爵位、俸祿，致使國家大亂。公元前660年，赤狄攻破衛國，衛懿公兵敗被殺。