Prologue: The Great Numbers of Heaven and Earth and the Genesis of Harmony and Transformation

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

In the eyes of the ancient forerunners, time was not an abstract number but the circulation of vital energy (qì) and the procession of the divine. The Twelve Terrestrial Branches (Zi 子, Chou 丑, Yin 寅, Mao 卯, Chen 辰, Si 巳, Wu 午, Wei 未, Shen 申, You 酉, Xu 戌, Hai 亥) already possess nascent forms in oracle bone inscriptions. Their essence lies in the ancient demarcation of Jupiter’s (the Year Star, sui xing 岁星) trajectory and a profound insight into the relationship between the Sun's apparent annual motion and the orientation of the Big Dipper.

The term "Harmony" (hé 合) is not mere superficial agreement, but rather the intersection point where "the Heavenly Dao revolves counter-clockwise, and the Earthly Dao revolves clockwise." The term "Transformation" (huà 化) denotes the "qualitative change" arising from the confluence of Yin and Yang energies in specific spatial and temporal junctures.

The Guanzi (管子) states in the chapter Xīn Shù (心术): "That which nurtures and transforms all things is the Dao" (化育万物者，道也). The Harmony and Transformation of the Terrestrial Branches are, in essence, a microcosm modeling the creation of the cosmos and the conversion of cosmic momentum. Why are there "Six Harmonies"$1 The Huainanzi, in its chapter Tianwen Xun (天文训), offers the most original astronomical explanation: "When the Moon-Lord is in harmony with the Month-Regent" (月将与月建相合).

The Month-Regent (yuè jiàn 月建) refers to the direction indicated by the handle of the Big Dipper (a Terrestrial Branch). The Moon-Lord (yuè jiàng 月将) refers to the Sun's position within the twelve divisions of the ecliptic (corresponding to the Branches but in reverse sequence).

When the Dipper handle points to Zi (the 11th lunar month), the Sun resides in the Chou mansion, hence Zi Chou harmonize.
When the Dipper handle points to Yin (the 1st lunar month), the Sun resides in the Hai mansion, hence Yin Hai harmonize.
By extension, the Six Harmonies represent the copulation (交媾, jiāo gòu) of Heaven (Sun) and Earth (Dipper position).

Using this as our foundation, this article will systematically analyze the profound meaning of the transformations resulting from these six pairs of harmonies.