Before we ordered the room, Ingmar had already gave us lots of suggestions. After we arrived around 23 o’clock in the evening, We just find out that Ingmar was waiting for us in front of the building, he kindly introduced us how to find all the equipments. By the way, we should have talked about his kindly neighbor, Roy and Chen, it was very nice of them that they also offered us a lot of helps, I will certainly choose to come back again when the next time I come here to Berlin. Fairwell and best wishes!