Mi Fei (1051-107), formerly known as Kun, was later changed to Kun, whose real name was Mi or Qian. At that time, it was named Haiyue Waishi, and it was also named the descendant of Kun Xiong and Huo Zheng. Calligrapher, painter and painting theorist in Northern Song Dynasty, together with Cai Xiang, Su Shi and Huang Tingjian, are also called "Song Sijia".