According to Wu Xing theory, the structure of the cosmos mirrors the five phases. Each phase has a complex series of associations with different aspects of nature, as can be seen in the following table. In the ancient Chinese form of geomancy known as Feng Shui practitioners all based their art and system on the five phases (Wu Xing). All of these phases are represented within the Ba gua. Associated with these phases are colors, seasons and shapes; all of which are interacting with each other.

Based on a particular directional energy flow from one phase to the next, the interaction can be expansive, destructive, or exhaustive. With proper knowledge of such aspect of energy flow will enable the Feng Shui practitioner to apply certain cures or rearrangement of energy in a way they believe to be beneficial for the receiver of the Feng Shui "Treatment."

Source: Wu Xing - Wikipedia, the free encyclopedia