Introduction to Yangchangzaka: From the gorge, you can see a zigzag mountain road between the opposite peaks, which is the "Yangchangzaka" built by ancient people. It is not only the only channel for communication and communication between villagers in Shanxi and Henan, but also a military fortress for offensive and defensive operations during war years. Bai Juyi, a famous poet in the Tang Dynasty, also visited this place and left a poem here: "It's cold and the sun is not bright, Taihang Peak is vast, I have heard of the dangers, but now I am going alone, the horses' hooves are cold and slippery, and the sheep's intestines are not strong "The road up there is as difficult as the world, but it is as smooth as the palm of your hand." It must have been a winter after the Anshi Rebellion when Bai Juyi came here. The mountains were vast, the wind was howling, the mountain roads were rugged, covered with snow, and there were ragged mountain people on the road. While running around for a living, there were bones on the roadside that had died of cold and hunger, as well as old people, women and children who had fled famine, and the sounds of tears, hunger and cold could be heard endlessly. Seeing these miserable scenes, the poet thought of his own rough life experience and sighed, "If it is more difficult than the world, it is as easy as the palm of my hand."