Together with Dr. Yuji Sugita (RIKEN) and Prof. Shoji Takada (Kyoto University), we organized an international meeting: Symposium on Computer Simulations and Cryo-ET/EM of Complex Biomolecular Systems, 18-19 Nov 2021. We received over 400 registrations from 32 countries, and there were nearly 200 people connected online in the virtual meeting. We discussed computer simulations and Cryo-ET/EM for membrane protein systems, as well as advances in enhanced sampling and accelerated MD methods. It was a wonderful event, supported by our MOST-RIKEN international collaboration grant.