Qingfei Gao is an associate professor in the School of Transportation Science and Engineering of Harbin Institute of Technology, and a test inspector of highway and water transportation engineering (bridge and tunnel engineering, road engineering). He has made important research results in long-term service performance of bridge structures under extreme environment, intelligent inspection and rapid assessment of bridges, design theory and construction technology of complex bridges, and structural condition assessment and load limiting theory of existing bridges. In the past five years, he has presided or participated in more than 10 scientific research projects. He has also presided over more than 30 horizontal projects, such as bridge design, construction technology, bridge inspection, maintenance and repair and reinforcement, etc.