University of Electronic Science and Technology of China (UESTC), Zhejiang University, affiliation not provided to SSRN, Nanjing University of Science and Technology, Nanjing University of Science and Technology, affiliation not provided to SSRN, Guangxi University, Kunming University of Science and Technology, University of Electronic Science and Technology of China (UESTC) and University of Electronic Science and Technology of China (UESTC)