After coming down from the parking spot, it is the tree mill. The mill is built on the water and powered by water. The wooden water wheel drives the stone mill to rotate, and the green and wheat are ground into powder. Next to the mill is a large prayer wheel that runs along the wooden bridge next to the prayer wheel to the other side of the river. The water of the tree is very magical, one is blue, one is green, and the common ground is crystal clear. In fact, the water in Jiuzhaigou is the most beautiful when overlooking it. Shuzhengzhai is also one of the longest walking spots in the world. Behind the tree is the tree Zhengzhai, the film "From the ancient heroes out of the juvenile" location, but now the scene has rejected any TV drama film framing, the purpose is to restore a better Jiuzhaigou.