July 24, Mr Karl Hallding, Head of the Stockholm Environment Institute’s China Cluster, visits SIIS and exchanges ideas with Prof. Yu Hongyuan, Deputy Director of the Institute for Comparative Politics & Public Policy Studies, Dr. Ye Yu, Director Assistant of the Institute for World Economy Studies, and Dr. Cheng Baozhi, research fellow of the Institute for Global Governance Studies on a variety of issues including trend of global energy, environment security and climate negotiation.