Cao's study and work resume.

Educated youth households of Xinfa Brigade, Frye Commune, Daan County, Jilin Province 1977. 1

1977.2-1980.1students of Chinese Department of Jilin Normal University

1980.1-1983.7 assisted by the library department of northeast normal university.

1981.8-1983.1Peking University library department for further study.

1983.7- 1986.9 Institute of Ancient Books Arrangement, Northeast Normal University.

1986.9- 1992.9 Lecturer, Institute of Ancient Books Arrangement, Northeast Normal University

1992.9-2000.8 Associate Professor, Institute of Ancient Books Arrangement, Northeast Normal University

1998.8-2003.6 Ph.D. student majoring in pre-Qin history, Department of History, Northeast Normal University.

September 2000-Professor, Institute of Ancient Books Arrangement, College of Literature, Northeast Normal University

2003. 1 1—— Doctoral supervisor of ancient literature and literature in College of Literature, Northeast Normal University.