Wu Xing -
Wu Xing, or Five Elements, are:
The concept of Wu Xing is important in Chinese medicine, astrology and Fengshui.
The 5 Elements [Wu Xing] are used in conjunction with Bagua as follows:
The 5 Elements [Wu Xing] are used in conjunction with Ba Zi, astrology and Fengshui as well.
According to Ba Zi, these five elements are very closely related to each other and their relationship can be explained using the Cycle of Birth and Cycle of Destruction.
Cycle of Birth:
⇒ Metal ⇒ Water ⇒ Wood ⇒ Fire ⇒ Earth ⇒
Cycle of Destruction:
⇒ Metal ⇒ Wood ⇒ Earth ⇒ Water ⇒ Fire ⇒
Note 1: Traditionally all Chinese maps are drawn with the direction
South at the top of page. This differs from the modern practice of placing
the direction North at the top of page.
See this for example.