1. Assistant Professor, Western China Center for Economic Research, Southwestern Univ. of Finance and Economics, Chengdu 611130, P.R. China. ORCID: .
2. Assistant Professor, School of Marxism, Sichuan Agricultural Univ., Chengdu 611130, P.R. China.
3. Associate Professor, Western China Center for Economic Research, Southwestern Univ. of Finance and Economics, Chengdu 611130, P.R. China. ORCID: .
4. Assistant Professor, School of Finance and Economics, Jiangsu Univ., Zhenjiang 212013, P.R. China (corresponding author). ORCID: .