my country has a vast territory and diverse landform types, each with different causes. There are external forces such as weathering, erosion, transportation, and sedimentation, and internal forces such as crustal movement. For example, "The green mountains on both sides of the strait are facing each other, and the solitary sail is coming from the sun" (Li Bai of the Tang Dynasty) can be understood as a description of the landform eroded by flowing water. That is, when the earth's crust is uplifted, the flowing water cuts deep into the valley, causing "the green mountains to face each other." And Among the descriptions of karst landforms, Lu Lun, a famous poet of the Tang Dynasty, wrote "Green clouds emerge from the road, and the wild countryside enters the deep caves". It is an excellent poem that describes the landforms of the Guizhou Plateau where the karst landforms are in the middle stage of development. The description is clear and appropriate. Naturally, it shows the landform characteristics of the Guizhou Plateau. "The road to Shu is difficult, and it is difficult to reach the blue sky." landforms. "Viewed horizontally, there are ridges and peaks, with different heights near and far." (Su Dongpo, Song Dynasty)'s poem is a typical description of mountain topography, reflecting the majesty and beauty of Mount Lu. "Egret Island is divided into the middle" (Li Bai) "On the beach, thin grass meets sparse forest, and the waves are so bad that the boat is about to sink." The common herons and gulls are not in Jiupu, but last year the sand spit was in the center of the river" ("Huangfu Song" in Tang Dynasty) can illustrate the sedimentary landform of the Hexin Island formed by river alluvial. "The sky is blue, the fields are vast, and the grass is blown by the wind and cattle and sheep are low" ("Hulüjin" in the Northern Dynasties) shows the vast and magnificent grassland landforms of China's Inner Mongolia Plateau, vividly depicting the fertile grassland, the herds of cattle and sheep, and the peace and tranquility. "The water of the Yellow River comes up from the sky and flows eastward to the sea and never returns" (Li Bai) not only explains that the terrain of our country is higher in the west and lower in the east, but also reveals the law of water circulation between sea and land. The land runs off into the sea, and seawater can only flow from there. The air is transported over the land through the atmosphere, and the implicit water cycle allows the water resources on the land to be regenerated and replenished.