汕头大学
After graduation, Du joined the faculty of Renmin University of China Department of Law. He was a professor at National School of Administration from 1997 to 2004. He became the Chief Professor () of Shantou University Law School in 2004 and was appointed the Dean of Shantou University Law School in March 2007. He left Shantou University and joined the faculty of Hunan University Law School in 2009, and was the dean of the school from 2010 to 2015.