1. School of Law and Business, Wuhan Institute of Technology, No. 206 Guanggu 1st Road, Wuhan 430205, China
2. School of Statistics and Mathematics, Zhongnan University of Economics and Law, No. 182 Nanhu Avenue, Wuhan 430073, China
3. Postdoctoral Station of Statistics, Zhongnan University of Economics and Law, No. 182 Nanhu Avenue, Wuhan 430073, China