2. Source: The Biography of Insects by Cai Hengzi in Qing Dynasty Volume I: It has two meanings to geography, or the main head or direction.
3. Luan Tou, a geomantic term. It first appeared in Lian, and it is recorded in detail in the existing Lingzhen Column: it refers to the situation of mountains. Looking at the "Luan Tou" in Feng Shui is to judge the angry place by looking at the situation of mountains and rivers. Surrounded by mountains and waters, beautiful places are mostly places where anger "gathers but does not disperse, but stops". It is nourished by extracting anger through printing, so as to obtain a good place for Feng Shui. Therefore, the way of feng shui is to take the shape of a hole, which is enough to hold water, but the water won't let me go.