Introduction to rock spring stone carvings: Throughout the ages, countless literati and poets have made pilgrimages and traveled here, and left many famous sayings on the cliffs. Among the entire group of stone carvings, "Flying Clouds and Flowing Clouds" by Zhang Xu, the grass sage of the Tang Dynasty, is the most recommended. Each character is 2 meters high and 1.5 meters wide, with high spirit and elegant pen and ink.