The Profound Principles of the Five Combinations of the Heavenly Stems and Various Scholarly Conjectures: An Age-Old Mystery from the Hetu and Luoshu to Celestial Astronomy
The Five Combinations of the Heavenly Stems (Jia-Ji combining into Earth, Yi-Geng into Metal, Bing-Xin into Water, Ding-Ren into Wood, Wu-Gui into Fire) constitute one of the most fundamental yet mysterious theories in Chinese metaphysical arts. This article delves into the profound principles behind them, analyzing various conjectures and demonstrations of 'combination and transformation of qi' from dimensions including the Hetu numerology, celestial astronomy, and the Five Phases and Six Qi system, revealing the cosmic vision underlying this ancient law.

Chapter Seven: Detailed Imagery and Life Metaphors for Each of the Five Combinations
To help readers more deeply understand the Five Combinations, we must examine not only principles but also imagery. Each combination is like a short film, dramatizing different life scripts.
1. Jia-Ji Combination: The Union of Centrality and Uprightness
- Imagery: A great tree (Jia) rooting itself in pastoral fields (Ji).
- Character: The person is broad-minded, upright, and trustworthy. Jia-Wood's benevolence and Ji-Earth's tolerance combine perfectly.
- Negative aspect: If the combination fails to transform, or reaches a state of death and exhaustion, it may manifest as stubbornness, rigidity, inability to adapt -- even a certain spinelessness (Jia-Wood loses its ambition, content only with pastoral life).
- Social relations: Represents stable partnerships, like a landowner and tenant farmer, or a solid marriage.
2. Yi-Geng Combination: The Union of Benevolence and Righteousness
- Imagery: Pruning flowers and plants. Geng-Metal is the shears; Yi-Wood is the bonsai.
- Character: The person combines firmness with flexibility, values loyalty, and is decisive. Yi-Wood, trimmed by Geng-Metal, appears orderly and disciplined.
- Negative aspect: If the transformation is not genuine, it may manifest as calculating, harsh, or indecisive (Yi-Wood entangles Geng-Metal's hands and feet).
- Social relations: Often carries a coloring of "conquest" and "being conquered," or a partnership based on rules and discipline.
3. Bing-Xin Combination: The Union of Authority and Control
- Imagery: Sun and moon meeting, or jewels gleaming under blazing sunlight.
- Character: The person is dignified and imposing, yet also passionate. When Bing-Fire's ardor meets Xin-Metal's refinement, emotional entanglements readily arise.
- Negative aspect: Lustfulness, hedonism, vanity. Xin-Metal (jewelry) under Bing-Fire (the spotlight) loves to perform.
- Social relations: Often involves transactions of power and beauty, or unions based on interest and prestige.
4. Ding-Ren Combination: The Union of Excess and Concealment (also called the Union of Benevolence and Longevity)
- Imagery: Starlight (Ding) reflected on a lake's surface (Ren).
- Character: The person is clever, sensitive, and charismatic. Ding-Fire's tenderness and Ren-Water's fluidity combine to create something deeply romantic.
- Negative aspect: The reason it is called "excess and concealment" (yinni) is that Ding-Ren combines into Wood. Wood is Young Yang, governing growth and proliferation -- implying excessive expansion. Moreover, both Ding and Ren are inherently soft and yielding (though Ren is nominally Yang Water, its essence is thoroughly yin), making one susceptible to drowning in private passions, lacking masculine vigor.
- Social relations: Often indicates clandestine connections, ambiguous relationships, or a kind of unspoken mutual understanding.
5. Wu-Gui Combination: The Heartless Union
- Imagery: A rainbow. Rain (Gui) meets sun after the storm (Wu-Earth's dry qi), transforming into Fire (the rainbow).
- Character: The person appears honest outwardly (Wu) yet is inwardly shrewd (Gui). Turns heartless swiftly, because Fire is inconstant -- rising fast and extinguishing quickly.
- Negative aspect: Fickleness, hypocrisy. Wu-Earth, which should be sincere, becomes mud when soaked by Gui-Water; Gui-Water, which should be resourceful, becomes stagnant when blocked by Wu-Earth.
- Social relations: Often a union based on short-term interests, like a fleeting romance -- beautiful in its moment (like a rainbow) but difficult to sustain.