空谷幽兰

Explanation: Valley beautiful orchids. Described as very rare, used to describe the character and elegance. 　　Source: Qing Liu E, "Travels" The Fifth lonely valley of orchids, I really can not think of this place, there is such an expert. " 　　Examples: ~, I really can not think of this place, there is such an expert. (Qing Liu E, "Travels" The Fifth)