Introduction to Yanzi Rock: Yanzi Rock is named after swallows building nests and mortars in the stone crevices that are more than a hundred feet high. Looking up from the path under the cliff, you will see cliffs on all sides confronting each other, strange peaks towering, and huge rocks crossing the sky. , the vast sky is shrunk into a courtyard, which is impressive. Climbing up the stone path, you will be chiseling with knives and axes along the way, and you will see strange rocks. This is the essence of the entire ancient quarry site.