Shandong University of Technology, Xiangtan University, affiliation not provided to SSRN, Zhejiang University, Shandong University of Technology, Shandong University of Technology, Shandong University of Technology, Shandong University of Technology, Shandong University of Technology, Shandong University of Technology, Shandong University of Technology, Shandong University of Technology, Shandong University of Technology, Shandong University of Technology, Nanjing University, Shandong University of Technology and Zhejiang University