Since 1993, Kejun Jiang has been conducting research on climate change relative to energy policy analysis, with a focus on energy technology policy assessment, energy supply policy assessment, renewable energy development and energy conservation. In 1994 he began working on Integrated Assessment Model development for energy and GHG emission scenarios and policies, focusing on China and the global analysis. At present he is mainly working on energy and environmental policy assessments by leading the Integrated Policy Assessment Model for China (IPAC) team. Additional areas of research include energy and emission scenarios, energy policy, energy systems, energy market analysis, climate change, local environment policies and international negotiation. Since 1997, Kejun Jiang has been working with the IPCC, including for Special Report on Emission Scenario and Working Group III Third Assessment Report, leader author for IPCC WGIII AR4 Chapter 3, and leader author for GEO-4 Chapter 2. He is now CLA in WGIII of IPCC AR5, LA for IPCC AR5 Synthesis Report, and author for UNEP Emission Gaps. His recent research projects include energy and emission scenarios for 2030, low carbon emission scenarios up to 2050, assessments on energy tax and fuel tax, potential for energy targets in China, and development of Integrated Policy Assessment models. Kejun Jiang received his Ph.D. from the Social Engineering Department of Tokyo Institute of Technology.