Professor Xian Zhang is the Chair of the UN Commission on Science and Technology for Development, Chief Scientist of The Administrative Center for China’s Agenda 21 and Director of the Climate Change & International Cooperation Division. His research focuses on climate change, low-carbon technologies and CCUS development strategy. He has published more than 150 papers in journals including Nature Climate Change, Nature Reviews Clean Technology, Nature Sustainability and Nature Communications, and authored over 20 books. He has led or participated in more than 60 national and international cooperation projects. He is listed among the World’s Top 2% Scientists. Now he serves as the Secretary-General of the Writing Office for China’s Fifth National Assessment Report on Climate Change, as well as the Coordinating Lead Author for the Intergovernmental Panel on Climate Change Seventh Assessment Report.