Make it a point to eat at In and Out! It will be well worth your time. It was some of the best food we've had in China. We had a noodle dish that was amazing (wide noodles), chicken in a pot, pineapple rice (it comes in a pineapple!), and chicken breast strips with orchids. They all had interesting with complex flavors. The chicken was in a sweet sauce so it was a little much with the sweet rice, but I still wouldn't change what we ordered. The servers went out of their way to help us. The restaurant is decorated it sort of a modern loft meets old, countryside China.
The restaurant has won all sorts of accolades in Beijing so I think it's well respected locally as well. I think our meal was around 300 yuan, but we ordered very generously and also tried several different alcoholic beverages.
Definitely make sure you eat here while in Beijing!
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.