Dong Tianwu, a retired professor from the school of Mechanical and Electrical Engineering of Beijing University of Technology, is good at combining teaching and technology practice, to lead and guide students for enterprise services in his teaching process for many years. After retirement, Professor Dong donated more than 1900 micro-motors he had collected over the past few decades to Beijing University of Technology in two batches. With the support of the University, he established the Museum of Micro-Special Motor of Beijing University of Technology. With the help of the platform of the Museum, Professor Dong guided postgraduates and undergraduates to carry out their research, and popularized science to primary and secondary students. In this video, you will walk into the Museum of Micro-Special Motor of Beijing University of Technology, to meet the amiable old professor and his museum.