1. School of Statistics and Mathematics, Shanghai Lixin University of Accounting and Finance, Shanghai, China
2. Interdisciplinary Research Institute of Data Science, Shanghai Lixin University of Accounting and Finance, Shanghai, China
3. School of Statistics, Renmin University of China, Beijing, China
4. School of Statistics and Information, Xinjiang University of Finance and Economics, Urumqi, China
5. School of Statistics, Lanzhou University of Finance and Economics, Lanzhou, China