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