November 17th, Prof. Ballauff,Dr. Yan Lu from Helmholtz-Zentrum Berlin für Materialien und Energie and A'fang Zhang from Shanghai University visited our group and joined our mini seminar on "Polymer and soft matter". They also gave lectures titled "Dendrimers: Magic bullets or model systems of condensed matter", "Thermosensitive Core-Shell Microgels as Active Nanoreactors for Metal Nanoparticles", "Polyprolines within bulky polymers", respectively.