Cercia Director, Prof. Xin Yao, gave an invited keynote speech on the first day of the joint 2005 International Conference on Natural Computation (ICNC’05) and 2005 International Conference on Fuzzy Systems and Knowledge Discovery (FSKD’05), Changsha, Hunan, China, 27-29 August 2005. His talk is on “How Powerful Is Your Evolutionary Algorithm”.