A butterfly in the Amazon rainforest in South America, flapping its wings occasionally, may cause a tornado in Texas in two weeks. This is the famous butterfly effect, which was proposed by meteorologist Lorenz in 1963. The reason is that the movement of the butterfly's wings causes changes in the air system around it and causes the generation of weak airflow, which in turn causes corresponding changes in the air or other systems around it, thus causing a chain reaction. Ultimately leading to drastic changes in other systems. This effect shows that the results of the development of things are extremely sensitive to initial conditions. A very small deviation from the initial conditions will cause a huge difference in the results.