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Guides

• Five Phases Enter the Yi — How Yin-Yang and Wuxing Merged Into One System

  Yin-yang and the five phases started as two separate systems. Yin-yang ran with the Yi and the Yin-Yang school; the five phases first appear in the Shangshu, 'Hongfan.' Zou Yan pulled them together in the Warring States. In the Han, Dong Zhongshu, Meng Xi, and Jing Fang wired the five phases into the I Ching: gua-qi, najia, the six relations, generation and control. Only then did six-yao divination have a basis. How the merge happened step by step, and how it later shaped medicine and the technical arts — in one pass.

• Hetu and Luoshu in Yi Numerology — Origin, and Their Full Correspondence with the Trigrams and Five Phases

  The Hetu and Luoshu are the source diagrams of Chinese Yi numerology. The Xici Shang Commentary says, 'The Yellow River gave forth the diagram; the Luo River gave forth the writing; the sage took them as a model.' The Hetu pairs generating and completing numbers with the five phases; the Luoshu sets nine palaces to the Later Heaven trigrams. Where the two diagrams come from, how their numbers are laid out, how they match the trigrams and five phases, and how to use them today — all in one pass.

• Hexagram Order Principles — Beyond the Xugua Commentary, the Deep Rules Behind the 64-Hexagram Sequence

  The Xugua Commentary explains the 64-hexagram order by meaning, but some of its links feel forced. The order has three deeper rules: pairs by inversion or reversal, the cycle of yin and yang waxing and waning, and the symmetric head and tail of the two books. These three lay out the skeleton of the received sequence better than the Xugua Commentary alone.

• Jing Fang's Eight Palaces Sequence: Eight Palaces, World and Response Lines, Wandering and Returning Souls — A Different Hexagram Order

  Jing Fang's Eight Palaces sequence splits the 64 hexagrams into eight palaces led by the eight pure trigrams Qian, Kun, Zhen, Xun, Kan, Li, Gen, and Dui. Each palace holds eight hexagrams derived one line change at a time. World and Response lines fix host and guest; Wandering Soul and Returning Soul mark the state. This order is the foundation of Six Yao Najia divination. How the palaces are arranged, how World and Response are set, and what Wandering Soul and Returning Soul mean — all in one pass.

• Shang Jing and Xia Jing Structure — Why the 64 Hexagrams Split into Two Books and How the Order Works

  The received I Ching divides its 64 hexagrams into two books: Shang Jing with 30 hexagrams, Xia Jing with 34. Shang Jing runs from Qian and Kun to Kan and Li and speaks of Heaven's way. Xia Jing runs from Xian and Heng to Jiji and Weiji and speaks of human affairs. Why two books? Why 30 and 34? The numbers have rules behind them — pair by inversion or reversal, arrange two by two, mirror the head and tail. One guide explains it all.