1. Dongling School of Economics and Management, University of Science and Technology Beijing (USTB), Beijing, China
2. School of Management and Economics, Beijing Institute of Technology (BIT), Beijing, China
3. School of Economics and Management, Beijing Jiaotong University (BJTU), Beijing, China
4. School of Computer and Communication Engineering, University of Science and Technology Beijing (USTB), Beijing, China
5. Najran University, Saudi Arabia