Jinjie Liu, male, Ph.D. candidate. Born in July 1998, from Yantai, Shandong. In June 2023, graduated from Qingdao University of Technology with a master's degree in mechanical design and manufacturing and automation; In September 2023, he was admitted to the School of Mechanical and Automotive Engineering of Qingdao University of Technology to pursue a doctor's degree in mechanical engineering, under the tutelage of Professor Xinming Li.