Since the first bourgeois industrial revolution, mankind has made unprecedented achievements in the process of industrialization, urbanization and modernization, and also tasted the bitter fruit of environmental pollution, ecological destruction and resource and energy crisis. An important reason for this bitter fruit is that human beings have not correctly handled and coordinated the relationship between man and nature, and have done many stupid things that violate the laws of natural ecology. During the Great Leap Forward and the ten years' turmoil in 1950s and 1960s, China blindly carried out the campaigns to conquer nature, such as destroying forests and planting grass, reclaiming lakes and seas, and killing tigers and birds. Under the control of voluntarism, such as "man can conquer nature" and "how bold a man is, the land is productive", China engaged in "reclamation of mountains and cultivation of land under lakes" and "great refining". In recent decades, although the party and the state have taken a series of measures to protect the ecological environment and wildlife, return farmland to forests and grasslands, and control sand, water and mountains, the trend of environmental pollution and ecological destruction has not been fundamentally reversed due to excessive debts, difficulties in pollution control and slow ecological restoration. Practice and lessons make people realize that whoever violates the laws of nature will be retaliated by nature. The imbalance of natural ecology, that is, the fundamental reason for the destruction of ecological balance is the imbalance of the relationship between man and nature. Only by correctly handling and coordinating the relationship between man and nature and following the laws of natural ecology can we realize saving. ...