1979- 1984 undergraduate study of radiation medicine in Suzhou medical college 1984- 1987 assistant professor of radiation medicine in Suzhou medical college 1987- 1990 graduate student of radiation medicine in Suzhou medical college1990. Lecturer, Department of Medicine, School of Radiation and Public Health, Suzhou University, 2000-2003, Ph.D. candidate, 2000-2006, Associate Professor, Head of Department and Master Supervisor, School of Radiation and Public Health, Suzhou University, 2006-2007, Professor, Executive Vice President and Doctoral Supervisor, School of Radiation and Public Health, Suzhou University, 2007-present.