1. School of International Business and Management, Sichuan International Studies University, Chongqing 400031, China
2. School of Economics, Central University of Finance and Economics, Beijing 100081, China
3. School of Economics and Finance, Chongqing University of Technology, Chongqing 400054, China
4. College of Finance and Economics, Sichuan International Studies University, Chongqing 400031, China