Ko by original name, was a native of Wu-chin, Kiangsu province. His style name was Shou-p'ing, by which he became known later, and thus he assumed another style name Cheng-shu. His sobriquet was Nan-t'ien. He was a gifted landscape painter, but after realizing that he could not be equal in this genre to Wang Hui, his friend, he turned to paintings of flowering plants and developed a new phase in the mo-ku-fe ("boneless method") painting technique.
Yun excelled in tasteful landscapes depicted on a narrow picture plane. This work, executed in the style of the Yuan dynasty painter Ni Tsan, is a good representation of Yun's style.