Gu Kaizhi (; c. 344–406), courtesy name Changkang (), was a Chinese painter and politician. He was a celebrated painter of ancient China. He was born in Wuxi and first painted at Nanjing in 364. In 366, he became an officer (Da Sima Canjun, 大司馬參軍). Later he was promoted to royal officer (Sanji Changshi, 散騎常侍). He was also a talented poet and calligrapher. He wrote three books about painting theory: "On Painting" (), "Introduction of Famous Paintings of Wei and Jin Dynasties" () and "Painting Yuntai Mountain" (). He wrote: "In figure paintings the clothes and the appearances were not very important. The eyes were the spirit and the decisive factor."