The organizing committee cordially invites you to participate in the 8th International Symposium on Photochromism 2016 (ISOP 2016), which will be held at East China University of Science and Technology (ECUST), Shanghai, China on November 4-7, 2016. The 8th ISOP is a continuation of the successful series of symposiums on this topic, such as the very successful last two symposia 2010 in Yokohama and 2013 in Berlin. The international conference aims to provide a forum for discussing innovative research and development in the research field of photochromic molecule and functional photochromic materials, supramolecule and molecular switches, photochromic applications and relative phenomena. We hope that the conference can give you an opportunity to meet your friends and colleagues, meanwhile provide a forum for further interdisciplinary research discussion and international cooperation. We would appreciate you for your participation. If you have any inquiry, please feel free to contact with us by sending e-mail to the secretary (isop2016@ecust.edu.cn or maxiang@ecust.edu.cn). The final program and the guide for the conference can be downloaded now. Welcome to Shanghai! Sincerely Prof. Dr. He TIAN Conference Chair, Conference Organization, East China University of Science and Technology (China) Prof. Dr. Weihong ZHU Conference Co-Chair, Conference Organization, East China University of Science and Technology (China) Dr. Xiang MA General Secretary, Conference Organization, East China University of Science and Technology (China).