Hebei University of Science and Technology, Hebei University of Science and Technology, affiliation not provided to SSRN, Hebei University of Science and Technology, Hebei University of Science and Technology, Hebei University of Science and Technology, Hebei University of Science and Technology, Hebei University of Science and Technology, Hebei University of Science and Technology, Hebei University of Science and Technology and Hebei University of Science and Technology