Sun Yi, Associate Professor of Department of Social Medicine and Health Management, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology. I have a B.S. in Preventive Medicine, and M.S. in Health Statistics from the Tongji Medical University, and I have a Ph.D. in Epidemiology and Health Statistics from Huazhong University of Science and Technology. I have focused my scientific interests on the relationship of social psychology, behavior and health.