1. Global Energy Interconnection Development and Cooperation Organization (GEIDCO), No. 8, Xuanwumennei Street, Xicheng District, Beijing 100031, P. R. China
2. Research Centre for Sustainable Development, Chinese Academy of Social Sciences, No. 27, Wangfujing Street, Dongcheng District, Beijing 100010, P. R. China
3. Research Institute for Eco-civilization, Chinese Academy of Social Sciences, No. 27, Wangfujing Street, Dongcheng District, Beijing 100010, P. R. China
4. University of Chinese Academy of Social Sciences, No. 11, Changyu Street, Fangshan District, Beijing 102488, P. R. China