日韩精品久久一区二区三区_亚洲色图p_亚洲综合在线最大成人_国产中出在线观看_日韩免费_亚洲综合在线一区

Cheng Huiqiang, Assistant to the Director-General and research fellow of the Research Institute for Resources and Environment Policies, DRC, was invited to attend the Eco Forum Global Annual Conference Guiyang 2016 on July 9. Cheng delivered a keynote speech on low-carbon circular economy.