What is the surname of Cheng Kun, a modern calligrapher in China?

Wu (1920.11-1996), a native of Lezhi, Sichuan. Professor sichuan fine arts institute. Chinese name Wu was born in Lezhi, Sichuan. Date of birth1920.1date of death 1996. He is good at art and technology theory. 1945 graduated from the Oil Painting Department of National Art College. He has taught in Nanhong Art College, Southwest People's Art College and Southwest Art College successively.