Introduction to Longquan Gorge: Longquan Gorge is rich in water, grass, and products. There is the Longquan Gorge Waterfall, with roaring water and splashing pearls and jade, which gives people a strong impact; there is also Daheguan, an ancient pass from Henan to Shanxi. The outline of the three characters "Daheguan" is vaguely visible and can be seen. There are traces of ancient passes, ancient bridges and ancient plank roads. Historical records indicate that during the Three Kingdoms period, Cao Cao broke through the pass and entered the Taihang Mountains from here to capture Huguan.