Introduction to Tiannv Dressing: Tiannv Dressing is a natural three-step waterfall located one kilometer away from Changgou in Wuli. It is formed by mountain streams and springs. It is said that in ancient times, the two sides of this ditch were lined with immortals. Goddess often came down here to collect water. Over time, the water in the ditch became immortal, and mortal people came here to ask for water. It is said that using the water here to wash your face and comb your hair can cure all kinds of diseases and make your eyes clear and beautiful, hence the name Tiannu Dressing.