In fact, from the perspective of geomantic omen, there is Long Mai on the flat land. Although its logo is not as obvious as that of Long Mai in mountainous areas, there are still traces of it. Its signs are micro-topography and water flow, with mountains one inch high and water one inch low. Zhang's concise geoscience also said: "Lakes and rivers in the Central Plains are difficult to travel. If you find a dragon without a hole, its vastness is incomparable. This scale only looks at water, which is in the hole around the curved ring. If you still look for a hole with water, you will never be found anywhere. In addition, Long Mai's concept of quality is to examine the long-term of the mountain and distinguish the ups and downs of the mountain. You must know it! The method of distinguishing is: "According to different water sources, the enlarged trunk dragons are transported by rivers, while the small branch dragons are transported by Tianyuangou. It is enough to look at the length of the water source and the size of the branch. "Feng Shui experts also believe that the ranking of dragons is based on the distance of Longzu Mountain. Dragons have ancestors, just as water has a source and trees have roots. If its source is far away, the running water will be longer, and the deeper the root of the tree, the better the tree will grow. Similarly, in Feng Shui, the slower a mountain comes, the longer its fat footprints will be. If it is a short-lived person in the mountains, the blessings will be shortened accordingly. At the same time, we should also see that the Long Mai in Feng Shui generally reflects the trend of Chinese mountains, which is our ancestors' simplest understanding of China's geography and accumulated experience for thousands of years. As the younger generation, we should actively publicize and carry forward it.