It is a poem written by Yu Yue, a scholar in Qing Dynasty, which is used to describe the beautiful scenery of mountains, trees, streams and springs in Shibashui Scenic Spot, a famous scenic spot in Hangzhou.
What he means is that there are winding roads on the heavy mountains, and the springs flowing in the roadside streams are covered with high and low trees.
This poem uses repeated words to write the beautiful scenery in the mountains. Each group of overlapping words only describes the characteristics of different landscapes.