Heavenly Stems and Earthly Branches - Full Guide

Heavenly stems and earthly branches are the material of the four pillars—without them there are no Ten Gods, strength, or clash/combine talk. Below: stems, branches, interaction, and Na Yin—essentials for practice; read alongside a real chart.

1. Heavenly stems: outward “self”

Ten stems: Jia, Yi, Bing, Ding, Wu, Ji, Geng, Xin, Ren, Gui—heaven’s movement, the most visible layer. Stems govern outward expression and agency; the day stem is “me”; the other three stems map year, month, and hour relations and kin.

Each stem has Yin-Yang and element—odd Yang, even Yin:

• Jia (Yang Wood): firm, pioneering, like tall timber; exposed often career-driven, leadership or teams.
• Yi (Yin Wood): flexible, adaptive, like vines; with branch support, planning, culture, design.
• Bing (Yang Fire): bright, passionate, like noon sun; outgoing, expressive; excess can be restless.
• Ding (Yin Fire): fine, inward, like lamp/candle; teaching, research, consulting needing patience.
• Wu (Yang Earth): heavy, inclusive, like mountains; real estate, finance, stable fields.
• Ji (Yin Earth): nurturing, practical, like fields; strong service sense, detail-minded.
• Geng (Yang Metal): decisive, like blade; execution strong, also impulsive.
• Xin (Yin Metal): refined, like gems; design, jewelry, beauty trades.
• Ren (Yang Water): mobile, like rivers; social strength, sales, strategy.
• Gui (Yin Water): moist, subtle, like rain; sharp intuition, backstage planning.

Practice point: check stem exposure and rooting. Hidden-stem support in branches makes force real; no root floats—talk more than action.

2. Earthly branches: inner “environment”

Twelve branches: Zi, Chou, Yin, Mao, Chen, Si, Wu, Wei, Shen, You, Xu, Hai—twelve zodiac animals, earth qi, environment, relationships. Each branch hides stems—the heart of BaZi subtlety.

Yin-Yang:

• Yang: Zi, Yin, Chen, Wu, Shen, Xu
• Yin: Chou, Mao, Si, Wei, You, Hai

Hidden stems (memorize):

• Zi: Gui
• Chou: Ji, Xin, Gui
• Yin: Jia, Bing, Wu
• Mao: Yi
• Chen: Wu, Yi, Gui
• Si: Bing, Geng, Wu
• Wu: Ding, Ji
• Wei: Ji, Ding, Yi
• Shen: Geng, Ren, Wu
• You: Xin
• Xu: Wu, Xin, Ding
• Hai: Ren, Jia

Branches carry season: Yin-Mao spring Wood, Si-Wu summer Fire, Shen-You autumn Metal, Hai-Zi winter Water, Chen-Xu-Chou-Wei seasonal Earth—directly drives elemental strength; spring Wood strong, summer Fire strong—strong/weak starts here.

Branches in practice: people and place. Day branch marriage; month branch career environment; year branch ancestry; hour branch children. Six clashes, six combinations, three harmonies, penalties, harms—Zi-Wu clash turbulence; Yin-Shen clash career turns.

3. Stem-branch interaction

Stems and branches interlock:

• Same pillar: stem vs hidden stems in its branch—strongest tie.
• Stem generation/control: Jia/Yi Wood generates Bing/Ding Fire, etc.—outward qi flow.
• Branch clash/combine/harmony: six clashes change, six combines stabilize, three harmonies gather force.
• Rooting and exposure: stems need branch support to stand—foundation of strong/weak.

Stems lean words and surface; branches lean environment and base—aligned flows; heavy clash shows friction sooner.

4. Sixty jiazi Na Yin

Sixty jiazi pairs ten stems with twelve branches in full cycle. Ancients assigned Na Yin Five Elements per pair—texture beyond plain elements—“Sword Edge Metal” vs “Sea Metal” differ though both Metal. Na Yin does not replace main Five Elements—only material nuance.

Sixty jiazi Na Yin table (practice essential):

Modern BaZi uses Na Yin mainly for natal texture and character nuance; main Five Elements and hidden stems still carry the load.

Review BaZi Charting - Step by Step to lock pillars, then Ten Gods and strong/weak. To cast with modern tools, visit Ming Ming Guan Zhi BaZi for a free trial.