Chapter notes · 五行大义
Each note says what that chapter teaches and why it matters for reading a chart. The annotated full Chinese reading is published on our Chinese site.
This chapter grounds the Five Elements (wuxing) in etymology, moral philosophy, and a precise numerological system, showing that bazi theory extends beyond simple interaction patterns.
The text begins by interpreting the semantic roots of wuxing (Five Phases) and the twelve dizhi (Earthly Branches). Each character is analyzed to reveal its original pictographic meaning—such as wood representing emergence and fire symbolizing transformation. This foundational layer explains why certain phases correspond to specific seasons and directions, providing the conceptual vocabulary needed to read a chart’s energetic quality.
Next, the work defines the "body" (ti) and "nature" (xing) of each phase, linking them to political ethics. For instance, Wood is associated with gentleness and pliancy, while Fire relates to brightness and upward movement. A chart analysis benefits from this by identifying whether a dominant element is operating in harmony with its nature or if it is distorted, which classical doctrine interprets as a sign of internal or external imbalance.
Finally, the chapter establishes a numerical framework derived from the *Yijing*’s Great Ultimate. It details the generative and completed numbers (shengshu and chengshu), the sequential values of the tianzhi (Heavenly Stems), and the logic behind nayin (Melodic Elements). Understanding these numbers allows readers to trace the quantitative life cycle of a pillar, moving from latent potential in the generative stages to mature expression in the completed stages.
Chapter 2 establishes the metaphysical infrastructure of Five Phase (wuxing) dynamics, covering generation, lifespan cycles, seasonal strength, and stem-branch integration.
The text begins by explicating the generative sequence—water birthing wood, wood birthing fire—and its cosmological roots in yin-yang qi. It then introduces the twelve-changsheng (twelve life stages) model, mapping how each element progresses through conception, birth, peak, and burial across the earthly branches. This cycle provides the chronological framework for assessing an element’s vitality at any given time.
Next, it details the five seasonal states: wang (prosperous), xiang (supporting), xiu (resting), qiu (imprisoned), and si (dead). These conditions determine elemental strength relative to the moon-order (yue ling). The chapter further explains that heavenly stems and earthly branches must interlock as yin-yang counterparts, forming the sixty-jiazi cycle that anchors temporal measurement.
Finally, it addresses the heterogeneity of the phases—how each contains traces of the others—and the concept of “de” (virtue/accord), which identifies auspicious alignments between stems, branches, and seasonal qi. For practitioners, these sections form the essential vocabulary for evaluating chart balance, determining when an element is truly supported or weakened, and selecting harmonious dates or configurations.
This chapter establishes the fundamental correspondences linking Wood, Fire, Earth, Metal, and Water to colors, sounds, flavors, and internal organs. This quxiang bili (taking images and analogical comparison) framework is indispensable for Bazi readers, providing the interpretive vocabulary needed to read a chart’s symbolic language beyond mere elemental strength.
The text details how each phase manifests physically and sensorially. It maps the five cardinal colors—such as the dark depth of bei shui (north water)—against the five tones (jue, zhi, gong, shang, yu) and five flavors. Understanding these links allows a reader to identify whether a chart’s energy is “pure” or disrupted. For instance, mixed colors or disordered musical tones signal imbalance, helping practitioners assess the harmony of a natal configuration’s inherent tendencies.
Crucially, the chapter ties these external signs to internal anatomy, assigning each organ a specific phase: Liver to Wood, Heart to Fire, Spleen to Earth, Lungs to Metal, and Kidneys to Water. While noting historical debates between textual schools, it ultimately follows the *Suwen* and *Jiayijing* standards. This anatomical mapping provides the structural backbone for interpreting organ relationships within a chart.
Finally, the text emphasizes dietary and sensory regulation, warning that excessive intake of any single flavor can damage its corresponding organ. By mastering these correspondences, the student gains the ability to see a chart not as isolated elements, but as a dynamic system of interacting qualities rooted in classical cosmology.
The Si Wu Da Yi establishes the cosmological framework linking musical calibration, celestial mechanics, and Five Phase dynamics to provide the theoretical basis for Bazi interpretation.
This chapter defines the lü Lü (Twelve Pitch-pipes) as the rhythmic bridge between time and cosmic energy. By applying the San Fen Sun Yi (Three Parts Gain and Loss) algorithm—alternating multiplication by two-thirds and four-thirds—the text generates precise numerical values for each pipe, anchored at the Huang Zhong standard. This mathematical sequence is not merely acoustic; it maps directly onto the Earthly Branches, particularly Zi (Rat) and Wu (Horse), ensuring that astrological charts align with seasonal thermodynamic shifts.
The Qi Zheng (Seven Luminaries) are then categorized to explain planetary influence. The primary definition includes the Sun, Moon, and Wu Xing (Five Planets): Jupiter, Mars, Saturn, Venus, and Mercury. Each planet corresponds to a specific direction, season, and moral domain, such as Mars representing summer conflict or Jupiter signifying spring prosperity. Understanding these associations allows readers to interpret how planetary movements reflect broader energetic trends in a natal chart.
Finally, the text outlines alternative definitions of the Seven Luminaries, including the Bei Dou (Big Dipper) and the Er Shi Ba Su (Twenty-Eight Mansions). It distinguishes between the Zhou, Yin, and Xia calendars, noting that each dynasty adopted a different first month. Recognizing which Zheng Shuo (calendar正统) applies is crucial when analyzing historical texts or ancient chart configurations.
This chapter establishes that all esoteric deities, from the Five Emperors to the Twelve Generals, are fundamentally expressions of wu xing (Five Phases) dynamics.
It begins by defining "shen" (spirits) as the unpredictable vitality of yin and yang. It traces their origin to the Heavenly, Earthly, and Human Sovereigns, linking them to wu di (Five Emperors). The text emphasizes that while spiritual names are numerous, their root logic remains unified within the cycles of generation and control.
A key distinction is drawn between tian yi (Heavenly One) and tai yi (Supreme One). Zheng Xuan’s commentary identifies Taiyi with the North Star, which resides centrally as the Great Emperor but moves through the ba gua (Eight Trigrams) as Tianyi or Taiyi. These figures govern the jiu gong (Nine Palaces), following the pattern of "yang emerges, yin enters."
The chapter then details the shi er shen jiang (Twelve Generals), such as shen hou (Deputy of the Spirit) and da ji (Great Auspiciousness). Each general corresponds to a specific branch, element, and function—such as war, agriculture, or legal disputes. It also maps the dun jia (Concealed Jia) Nine Gods to the Big Dipper stars.
Finally, it outlines three historical schools of the Five Emperors and assigns administrative roles to heavenly stems. This provides the structural framework for interpreting the symbolic functions of chart components beyond simple elemental strength.
These notes describe classical doctrine, not outcomes: no predictions, no promises and no medical, legal or financial advice. Traditional markers never affect a score.