Description: The book compares trees to the human body, and links and compares the structure and function of the two. On the one hand, it guides readers to observe the components of trees and their functions, and to understand the mechanism of the ecosystem of forests and their roles; on the other hand, it allows readers to feel the beauty and strength of community mutual support from the interdependence of trees, and to realize the wisdom of life of mutual communication, sharing and caring, and then learn how to become better people in the collective life. On the other hand, it allows readers to experience the beauty and power of community support through the interdependence of trees, and to realize the wisdom of mutual communication, sharing and caring.