Hongjie Ji was born in Tai'an, Shandong Province, China. She received her M.S. degree from Shandong University of Science and Technology in 2016, majoring in Mechanical and Electronic Engineering. Currently, Ph.D. is reading in the department of mechanical Engineering, WonkWang Univer sity, Korea. Since September 2016, she worked in the Institute of Mechanical and Electrical Engineering of Weifang Engineering Vocational College.