Below the yellow sand is a brief introduction of fertile soil.

Dadiwan was originally the place where Fuxi, Nuwa and other human ancestors lived and multiplied. However, due to long-term human reclamation activities, it has become dry and rainy and the land is barren. In order to burn firewood, farmers had to shovel the only turf in Shan Ye. Drinking water for people and livestock is pit water accumulated by rain. In order to resist drought, people have to spread a layer of sand on the land, so the cultivated land looks like an artificial desert. Poverty has produced a group of "old children" living on government relief food like "Wang Man Man" in the village.

Since the reform and opening up, the city's economic and cultural concepts have changed rapidly, but the economic and cultural changes in Dadiwan have been extremely slow, forming a state of opposition between prosperity and backwardness. However, social progress and the new wave of the times are bound to impact these marginal areas, especially the strategic decision of the CPC Central Committee on the large-scale development of the western region, and strongly impact this nearly closed poor village. The village began to shake, and people tried to break the inherent structure of traditional culture and spirit and get out of the mountains and poverty in different ways. The government organized "immigration" to Hexi, and young students worked hard to get into universities, which became the two main ways for Dadiwan villagers to "go out" (the local government called it "double immigration"). Therefore, it is possible to know and gain a new world. Li Wangshan, Li, Zhou Xueyan, Li, Yang Maihua, Shen, etc. It is a group of struggling people who dare to change the tragic fate of their ancestors in Dadiwan Village.