On invitation of professor Guo Xuhong of School of Chemical Engineering, ECUST, Mr. Matthias Ballauff, Director of Berlin Center, and Associate professor Lu Yan from the University of Potsdam visited ECUST for academic exchanges. Both professors made academic speeches which are entitled "catalysis by metallic and oxidic nanoparticles in aqueous solutions: Model Reactions" and "Thermosensitive Microgels as active nanoreactors for tuning the catalytic activity of metal / metal oxide nanoparticles" respectively. In their academic speeches, professors presented their progress on some frontier research fields like macromolecular assembly, metal catalyzed, protein adsorption separation and nano - reactors.