How to understand the correct concept of practice is the key to understand the relationship between man and nature and the unity between man and nature.

The relationship between man and nature is "the unity of man and nature", which is not only the expression of Confucianism, but also the best expression of the relationship between man and nature in the whole traditional culture of China. I think there are many Confucian expressions about the relationship between people, such as the idea that the benevolent loves others, and "Don't do to others what you don't want others to do to you" and "If you want to protect yourself, you can achieve it". These are the core ideas for dealing with the relationship between people.

Harmony between man and nature is the only way for economic and social development to a certain extent and stage, and it is the inevitable choice for human beings after summing up their experiences and lessons.

In the long history before the industrial revolution, the level of productivity was relatively low, human activities had little impact on nature, and man and nature maintained a relatively harmonious state. Philosophy emphasizes the connection, similarity and unity between "heaven" and "man", "nature" and "man-made". Zhuangzi believes that "heaven and earth coexist with me, and everything is one with me", and heaven and man are one; Confucius advocated the theory of "destiny", regarded "destiny" as the master of all things, and asked people to "respect destiny" and "fear destiny"; Laozi advocates "natural inaction" and thinks that people are powerless in front of nature and society. This simple view of "harmony between man and nature" led to the close and harmonious relationship between man and nature in ancient China. When dealing with the flood, we should "choose hills" to avoid the flood, "move the city to avoid it", "dredge the nine rivers" to divert the flood, and leave enough space on both sides of the river for the water to "rest, swim left and right, and be slow but not urgent" to store and detain the flood, which are all full manifestations of this idea. In the development of water and soil resources, the pre-Qin period emphasized that "the axe can enter the mountain with time, but the tree can't be used" and "those who don't plant trees have no trees", which played a very good role in protecting vegetation and planting trees.

With the passage of time, the rapid increase of population, the accumulation of human experience and knowledge, and the development of science and technology, especially after the industrial revolution, the ability of human beings to transform and influence nature has become stronger and stronger, and the idea that "man can conquer nature" and "man is the master of nature" has become stronger and stronger, and nature has gradually been regarded as an inexhaustible treasure, exploited and utilized unscrupulously, and at the same time regarded as a bottomless garbage bin. In recent decades, China's action of "changing the world" is unprecedented. In order to carry too many people, strive for more space and produce enough food, people occupy the river beach, reclaim land around the lake and destroy forests (grass) to open up wasteland; In order to meet the rapidly increasing demand for water, people have built one water storage and diversion project after another, which can cut off the Yellow River, dry up the Haihe River, drain the underground aquifer and use every drop of water. In order to reduce the production cost, sewage and wastewater are discharged into rivers and lakes without treatment.

More than a hundred years ago, Engels pointed out that human beings can dominate nature by changing it to serve their own purposes, but every step we take must remember that human beings never stand outside nature when ruling nature.

Nowadays, the concept of sustainable development is deeply rooted in people's hearts. Facing all kinds of problems in the field of water resources in China, it is an inevitable choice to transform and conquer nature to live in harmony with nature. Of course, this choice is not a simple repetition and regression of the distant past, but an all-round development and sublimation based on a deeper understanding and grasp of the law of water control and the pursuit and desire for sustainable development.