Qingdao University of Science and Technology, Qingdao University of Science and Technology, Qingdao University of Science and Technology, affiliation not provided to SSRN, Qingdao University of Science and Technology, Qingdao University of Science and Technology, Qingdao University of Science and Technology, Qingdao University of Science and Technology, Qingdao University of Science and Technology, University of Uyo, Qingdao University of Science and Technology and Qingdao University of Science and Technology