Aisin Gioro Yunki (Manchu: ᠶᡡᠨ ᡴᡳ, Möllendorff: yūn ki, Chinese: 允祺; pinyin: Yǔnqí; 5 January 1680 – 10 July 1732), born Yinqi and formally known as Prince Heng of the First Rank, was an imperial prince of the Manchu ruled Qing Dynasty. He was the fifth son of Kangxi Emperor who survived to adulthood.