Back to blog
#Twelve Earthly Branches #Six Conjunctions (Liu He) #Qi Transformation (Hua Qi) #Pre-Qin Philosophy #Ancient Cosmology

A Critical Examination of the Qi Transformation of the Twelve Earthly Branches' Six Conjunctions

This paper strips away the veneer of divination and numerology to return to Pre-Qin astronomy and cosmology, critically examining the true nature of the Six Conjunctions (Liu He) among the Twelve Earthly Branches (Zi Chou, Yin Hai, Mao Xu, Chen You, etc.). It focuses on analyzing the essential 'astronomical copulation' of the Six Conjunctions and the philosophical implications—such as concealment, generation, refinement, and transformation—embedded within their 'Qi Transformation' (Hua Qi).

Tianwen Editorial Team January 30, 2026 12 min read PDF Markdown
A Critical Examination of the Qi Transformation of the Twelve Earthly Branches' Six Conjunctions

II. In-Depth Analysis from the Ancient Perspective

This harmony is the most peculiar astronomically, known as the "Conjunction of the Sun and Moon" (日月之会). Wu corresponds to Qian (Heaven) in the Xiantian Bagua (Pre-Heaven Eight Trigrams), and Li (Fire) in the Houtian Bagua (Post-Heaven Eight Trigrams). Wei corresponds to Xun (Wind) in the Xiantian Bagua, and Kun (Earth) in the Houtian Bagua.

  1. The Qi of the Heavenly Origin and the Hongfan:
    • Wu represents the Sun (Day Star), and Wei represents the Moon (Night Star). Ancient astronomy established the boundary between Wu and Wei as the "Prime Meridian" of the celestial sphere (called Shu Gong 殊宫 in antiquity).
    • When the Dipper points to Wu (Summer Solstice), the Sun resides in Wei.
    • This is the moment of maximal Yang energy. The Summer Solstice marks the beginning of Yin's birth, but the thermal peak is reached in the month of Wei.
  2. Distinguishing the Qi Transformation—Fire and Earth Share the Same Origin:
    • Mainstream View: Transformation into Fire. Wu Fire is dominant, and the residual Ding Fire in Wei responds to it. Wei is inherently dry earth, which ignites readily when fire is applied. Thus, the harmony of Wu-Wei intensifies the force of Fire.
    • Alternative View: Transformation into Earth. Fire generates Earth; the Wu Fire feeds the Wei Earth, and the accumulated Qi ultimately reverts to Earth.
    • The Ancient Orthodox View: It depends on the specific context, but the essence is "Hot Energy" (燥热之气).
    • In the Suwen – Tianyuan Ji Dalun (素问·天元纪大论), under the reign of the Sovereign Fire, the Yin Essence is supported. The harmony of Wu-Wei represents the "ultimate convergence of light and heat."
  3. Philosophical Metaphor—The Celebration of Sovereign and Minister:
    • Wu is the Sovereign (Li/Sun); Wei is the populace (Kun/Earth).
    • The harmony of Wu-Wei signifies the Sovereign reigning over the world, and all people submitting willingly.
    • Unlike the "dark concealment" of Zi-Chou, Wu-Wei is the "brilliance displayed in broad daylight."

Conclusion The Harmony of Wu-Wei transforming into Fire (or Dry Earth) is the "Ultimate Fire" (极盛之火). It symbolizes the apex of development, the peak of glory, and simultaneously, the eve of "extreme flourishing leading to decline." Its Qi is predominantly Yang but carries a subtle Yin (the Yi Wood within Wei), representing the final burst of energy before maturity and harvest.