In the process of survival and development, human beings are always influenced by the above natural factors. Therefore, in order to survive and develop better, human beings must learn to "know, use, transform and conform to nature". It is also the four principles of Feng Shui.
From the topographic map analysis, Feng Shui believes that the Long Mai in the world originated from Kunlun Mountain. Geography holds that Kunlun Mountain is the roof of the world. It extends in all directions, and there are five main roads in all directions, among which three Long Mai are in China.
(3) Long Mai: 1, the root dragon and the vein: it is a vast area north of the Yellow River. 2. Long Mai: South of the Yellow River and north of the Yangtze River. 3. Looking for the dragon and the pulse: it is a vast area south of the Yangtze River. These three dry dragons originated in the northwest and headed southeast. China has formed a terrain that is high in the northwest and low in the southeast, "the sky is smaller than the northwest and the ground is smaller than the southeast".
Therefore, geomantic omen is a comprehensive subject integrating astronomy and geography. Based on natural things, yin and yang and five elements are the rules. It involves natural environmentology, geological geography, hydrology, ecology, landscape, aesthetics, biology, geophysics, architecture and moral theory, and is a comprehensive subject to study the relationship between nature and people.
The natural objects represented by the Eight Diagrams, such as dry sky, Kun land, thunder, wandering wind, water, fire and mountains and rivers, are exactly the elements that Feng Shui must use.