On Dec 7, the opening ceremony of the “centER Tsinghua-RWTH Aachen environmental research center” was held in DESE. Dean of DESE YU Gang and Prof. Hausmann from Environmental Engineering Research Center of RWTH Aachen hosted the ceremony. Doc. Koester, YAO Gang, Beier and ZHAO Fangfang, and Prof. ZUO Jiane, WANG Kaijun, and some Ph. D candidates gave keynote speeches on their own research project and extended heated discussion.