1. School of Business, Research Institute of the Economic and Social Development in the Dabie Mountains, Xinyang Normal University, Xinyang 464031, China
2. School of Economics, Shandong University of Finance and Economics, Jinan 250014, China
3. School of Finance and Economics, Jiangsu University, Zhenjiang 212013, China
4. School of Resource and Environmental Science, Shijiazhuang University, Shijiazhuang 050037, China