The ups and downs of things have a far-reaching impact on the development of nature and human society. The change of species number and species directly affects ecological balance and environment, and then affects human survival and development. Various systems of human society are constantly adjusted and reconstructed with the changes of time and space. Therefore, understanding the ups and downs of things is of great significance for us to understand the laws of nature and promote the healthy development of human society.
In the process of understanding material and social development, scientific use of the ups and downs of things can promote the development of science and technology and social progress. In agriculture, studying the growth law of crops can refine management and realize high yield, high efficiency and high profit. In the medical field, studying the law of human growth and aging can reveal the causes and treatment of diseases. In the process of social system reform, if we understand the historical laws of social development, we can correctly formulate policies and systems according to the laws and promote social progress.