Director General of German Ministry for Economic Affairs and Energy Thorsten Herdan speaks at 2017 International Conference on Renewable Energy Development and Technology in Frankfurt, Germany, June 16, 2017. (Xinhua/Shen Zhonghao)
Director General of German Ministry for Economic Affairs and Energy Thorsten Herdan speaks at 2017 International Conference on Renewable Energy Development and Technology in Frankfurt, Germany, June 16, 2017. (Xinhua/Shen Zhonghao)