Blue moon valley is one of the most beautiful and popular attractions nearby Lijiang city. Don't expect you to be alone there. In the high season the place becomes very crowded. I would not recommend you to go there during the summer time, because it's rain season there, so there's a risk not to see even a half of the mountain and the glacier on the summit. Anyway, I got there in the worst possible time for traveling around and still highly enjoyed it!