Guilin University of Electronic Technology, Guilin University of Electronic Technology, Guilin University of Electronic Technology, Guilin University of Electronic Technology, Guilin University of Electronic Technology, Guilin University of Electronic Technology, Guilin University of Electronic Technology, Guilin University of Electronic Technology, Guilin University of Electronic Technology, Guilin University of Electronic Technology, affiliation not provided to SSRN, Guilin University of Electronic Technology, Guilin University of Electronic Technology and Guilin University of Electronic Technology