Songhua Li, Professor of Shenyang Jianzhu University. 200409/201209 Dalian University of Technology, Mechanical Manufacturing and Automation PhD candidate. He is a member of China Mechanical Engineering Society and a senior member of the cutting advanced technology research branch of the mechanical industry metal cutting technology association. He is mainly engaged in the research of high-efficiency and precision machining technology and equipment for difficult-to-machine materials, high-performance CNC machine tool spindle systems, high-grade CNC machining equipment and technology for stone, modern construction engineering equipment and technology, etc.