Guojun is a Senior Engineer. His research work includes aspects of geotechnical cutting, the development of largescale high-performance mud pump, environmental dredging and treatment of contaminated sediment. He has completed more than 10 provincial and ministerial scientific research projects, and has received many awards, including the National Science and Technology Progress Award. He has obtained more than 40 patents, including 10 invention patents and published more than 30 papers, including 12 SCI/ EI retrieval papers.