I was in Oslo for a conference, and staying at Xueying's place really contributed to making Oslo a great experience. Xueying is very communicative and helpful, her place is a nice, really tidy, and well-equipped apartment, in a turn-of-the-century (I think) apartment house, located on the 4th floor (there is an elevator). It is located in, or at least very close to (not quite sure there) Grünerlokka, a very nice, hipster-like area with galleries, and loads of excellent restaurants and bars. Groceries and other shops are nearby, and it is only a 10-Min. bus ride (stop for three+ lines right outside) or a 20-Min. walk to the city center. Highly recommended.