Yes, Cao Haitao said, "You still find my question difficult. This year is my last year. Let Shen Wei give a question next year. " Cao Haitao, male, was born in June 1976 in Jiangyan, Jiangsu. At present, he is a professor at Nanjing Normal University, a doctoral supervisor, and the vice president of intensive training college, in charge of teaching. 1996 graduated from Suzhou University with a bachelor's degree in July. In July 2002, he graduated from Suzhou University with a doctorate. In July 2004, the postdoctoral fellow of the Department of Mathematics of Tsinghua University left the station.