Dongguan University of Technology, Dongguan University of Technology, Dongguan University of Technology, Dongguan University of Technology, Humboldt University of Berlin, Dongguan University of Technology, Dongguan University of Technology, Dongguan University of Technology, affiliation not provided to SSRN, Dongguan University of Technology, Dongguan University of Technology, affiliation not provided to SSRN, Dongguan University of Technology and Dongguan University of Technology