Kejun Jiang’s research focus is energy, climate change mitigation and air pollution prevention policy assessment by using IPAC modeling, to support national five year plans, and long-term planning. He began his research in ERI from 1990, and led the development of Integrated Policy Assessment Model for China(IPAC). IPAC modeling team is now a leading research team on China’s 2050 energy transition studies by providing benchmark research results. He also was LA and CLA for IPCC reports, and authors of WEOs, Emission Gap reports by now.