Xiling Snow Mountain Yin-Yang Boundary The Baishagang of Xiling Snow Mountain has a long trestle Road on the alpine ridge and a watershed on the Yin-Yang Boundary. It is dark on the one hand and sunny on the other. Yanggang sunrise, Yinshan rain, Gangnan warm Gangbeiliang. Sunny sky shines in the Yangshan Mountains, clouds and mists are thick in the Xiliang River. The vast sea and sky look high at the east, while the clouds and clouds in the West are vast. Yin Ping Yang Secret is not absolute. What's wrong with taking a step back?