Ma KeyaoMa Keyao is a Chinese historian who is a professor and doctoral supervisor at Peking University.BiographyMa was born in Wenshui County, Shanxi, in June 1932. In 1952 he entered Peking University, where he majored in history. After graduating in 1956, he taught at the university. He was promoted to full professor in 1985. He served as director of the Department of History from 1986 to 1992.Works*