seventy miles outside Chang'an City, Li Mansion in Huxian County.,Li Wangyu stood with a slight toothache in the bathhouse paved with blue stones, watching a young maid of twelve or thirteen years old struggling to move a large wooden tub filled with hot water and pouring it into the bathing tub.,Li Wangyu suddenly understood, this must be what the Tang Dynasty called "Mu Lan," right。