In the traditional theory of Wu Qin's geomancy, it is always said that besides the mysterious ghost fire, there are three kinds of fires in the world, namely, human fire, dragon fire and skyfire. Dragon fire can burn quietly in the water, and human fire is the eternal fire of burning wood and cutting pulp; And skyfire is thunder fire, called the fire of hating the world. If the world's morality fails, or things are old and unfamiliar, it is easy to get burned. People say that it was Lei who opened his eyes and punished evil spirits and evils. In fact, it is the "Qi" in the four doors of Feng Shui "shape, potential, reason and Qi" that has changed, which leads to the imbalance between heaven and earth, and only then can lightning interact among clouds.