There are many kinds of metaphysics. Just like science, there are many kinds. For example, the two main categories are. Physics and chemistry. After mathematical operation. The result is the product. That is, technology products. ... ancient people. There are no flying machines. And developed means of transportation. And no binoculars. But they know that the earth is round. In the earliest book "Temen Shield", the five elements. Kim. Wood. Water. It's on fire. Earth. . .. wood. Represents life. Wood is produced by water. That is to say. As long as there is life, there is no water. . Some people might say. Not in the desert. Cactus can also grow. In fact, why cactus can grow in the desert. No matter what creature it is. Plants. Everyone has a digestive system. This is what we call a chemical reaction. . It is too complicated. Talking is beside the point. . Simply put, the metaphysical formula. Just like the chemical formula S+O2 = = SO2 of carbon dioxide in modern science. . The chemical formula of (O2, O2) water H2O ... This is the molecular formula before the discovery of ions. . . The later formula of ionics. H4O2..)

Answer `` with metaphysics. . Wood makes a fire. Fire made the earth. That is, the gas after burning charcoal and oxygen in the air is carbon dioxide. In the five elements, soil actually represents qi. )