2. The Five Elements Theory is an analogy theory in ancient China. Instead of the five elements, everything is divided into five categories according to the nature of moistening, inflammation, straightness, culture and cultivation: water, fire and wind. It is different from the four-element theory of ancient western countries, and it is a combination of philosophy, divination, fortune telling, calendar, traditional Chinese medicine and sociology.
The five elements mean that the ancients divided everything in the universe into five things: wood, fire, earth, gold and water, which are called "five elements". See the dialogue between Ji Zi and Zhou Wuwang recorded in Shang Shu Hong Fan: "Five elements: water, fire, wood, gold and earth. Water is wet (moist), fire is burning (burning), wood is straight (bent, loose), gold leather (dense composition, easy to divide), soil fertilizer (meaning sowing and harvesting). Moisturizing is salty, inflammation is bitter, straight is sour, leather is spicy, and farming is sweet. " This paper not only classifies everything in the universe, but also defines the properties and characteristics of each category. More than 3,000 years ago, Ji Zisheng lived on Wuxing Mountain, where Ji Zi not only observed the astronomical phenomena, but also invented Weiqi. The Wuxing Mountain in Journey to the West refers to this Wuxing Mountain. According to the understanding of the five elements, later generations established the theory of mutual generation and mutual resistance of the five elements, mainly based on the law of "mutual generation and mutual resistance of the five elements".
4. Mutual development refers to the mutual help and promotion between two things with different attributes; Specifically: wood fire, fire produces soil, native gold, gold produces water, aquatic wood.
5. Mutual containment, on the contrary, means that the relationship between two things with different attributes of five elements is mutual containment; Specifically: Mu, Tuke water, water, Huo, Jin Kemu.