1. School of International Trade and Economics, University of International Business and Economics, Beijing, China
2. UIBE Belt & Road Energy Trade and Development Center, University of International Business and Economics, Beijing, China
3. China Center for Energy Economics Research (CCEER), University of International Business and Economics, Beijing, China
4. School of Business, Central South University, Changsha, China
5. Adam Smith Business School, University of Glasgow, Glasgow, UK