Kunming University of Science and Technology, Kunming University of Science and Technology, Kunming University of Science and Technology, Kunming University of Science and Technology, Kunming University of Science and Technology - The National Engineering Laboratory for Vacuum Metallurgy, Kunming University of Science and Technology, affiliation not provided to SSRN, Chongqing University, Kunming University of Science and Technology, Kunming University of Science and Technology, Kunming University of Science and Technology, Kunming University of Science and Technology and Kunming University of Science and Technology