A BaZi, four pillars in total. Each column comprises two characters: one above and one below. The top is the Heavenl Stem; the bottom is the Earthly Branch. Many beginners only know they represent time symbols, yet cannot distinguish why there are two sets—the differences in information they carry.
The ancients said Heavenly Stems belong to the Heaven, as flowing Qi; Earthly Branches belong to the Earth, as containing spaces. Qi manifests outward; Space hides inward. This is the starting point for understanding Stems and Branches. The same Five Element placed on a Stem versus buried in a Branch reveals completely different states.
I. First, Understand the Main Principle: Stems Rule Outer, Branches Rule Inner
Heavenly Stems represent the outward, manifested parts—the traits peers see, how one expresses to others, and the daily style of action. It is like the visible self, a signal of movement or news, easily caught in interpersonal dealings.
Earthly Branches represent the inner foundation—the hidden bottom line, true inner thoughts, long-term rooted environments, and fate factors brewing in the shadows. Branches also hide residual Qi, often called Hidden Stems, where many deep clues are buried. Outsiders find them hard to see until observing carefully.
Think of a simple analogy: Heavely Stems are like branches and leaves, unfurled outward; Earthly Branches are like tree roots, deeply buried in soil. How the leaves look is seen immediately; how strong the roots are decides if the tree can endure. Leaves sway with wind, changing quickly; roots anchor in one spot, relatively calm.
Thus, reading BaZi follows an order: first, see what image the Stem reveals; then dig deeper to see what Qi the Branch holds. Using only Stems risks surface-level readings; using only Branches makes outward expression unclear.
II. The Ten Heavenly Stems: Their Original Imagery
Jia Wood, Yang Wood. Tall, upright tree,自带 upward-reaching power. Traits include uprightness and strong opinion; willing to take on tasks, good for expansion and framing structures. But being so straight also lacks circuit; prone to ignoring adaptability.
Yi Wood, Yin Wood. Vines, flowers—soft yet resilient. Dislikes hard clashes, excels at following trends and social diplomacy. Delicate mind, strong sensitivity, suited for dependency, coordination, and creative fields. Their strength hides within the softness.
Bing Fire, Yang Fire. Like the Sun in sky, bright externally, loves expression, infectious presence. Walks where you are noticed. When fire is potent, generous and passionate; when over-swept, heat comes fast and cools fast.
Ding Fire, Yin Fire. Like candle or lamp flame—light not boastful, yet long-lasting. Delicate mind, great observer, willing to deep-dive silently, suited for study and fine work. When weak, prone to sensitive thinking and endless rumination.
Wu Earth, Yang Earth. Like high plateau soil, steady and thick, strong capacity to hold weight. Does things solidly, has bearing ability; when too heavy, prone to stubborn slowness, resistant to change.
Ji Earth, Yin Earth. Like garden mud, warm and fine, good at harmonizing everything. Excels at details and handling small tasks, patience is ample; when weak, prone to second-guessing, hard to decide.
Geng Metal, Yang Metal. Like ore or sword, straight-forward nature, strong decisiveness, clear right/wrong distinctions, possessing power to clean and break through. Metal air too sharp, speech often direct, accidentally hurting others.
Xin Metal, Yin Metal. Like gemstone, fine metal—refined quality, knows how to gather in, delicate aesthetic, good at polishing and refining. Needs protection; when surroundings mismatch mood, sensitive and overthinking.
Ren Water, Yang Water. Like rushing river, unbounded flow, many ideas, wide horizon, strong adaptability. When water momentum is high, ideas scatter, hard to settle.
Gui Water, Yin Water. Like mist or clear spring, fine and silent, strong seepage power, sharp instinct, able to perceive the subtle. Qi slightly weak, emotions internalized, secrets kept in heart.
Stems are exposed Five Elements Qi, generally simple and pure, imagery is white and direct.
III. The Twelve Earthly Branches: Hiding Time Sequence and Inner Mechanisms
Zi, Yang Water, River Deep Water. Mainly concealed, thoughtful, hidden currents. Often linked to secret thoughts and night-time planning. In stillness, accumulates power; once moved, change is dramatic.
Chou, Wet Earth, Metal Vault. Earth containing Water and Metal, a space for storage. Embraces complexity; much appears calm on surface while brewing beneath.
Yin, Yang Wood, Wood's Lu Position. Early spring sprouting, vitality activating, representing new beginnings, action, and outward breakthrough. Opportunities often sprout from here.
Mao, Yin Wood, Wood's Prosperous Land. Grass spreading, vitality舒展，leaning towards interpersonal connection, softness in expansion. Also a place easily stirred for emotions.
Chen, Wet Earth, Water Vault. Water vault storing water Qi, Earth hiding Water and Wood within—a space of take and release. Many turning points happen here, secretly holding variables.
Si, Yin Fire, Fire's Lu Position.Like hearth fire, sustained heat, main force for continuous planning and quiet progress. Fire hidden inward, not as showy as Bing Fire.
Wu, Yang Fire, Fire's Prosperous Land. Midday Sun, peak fire Qi, representing highlights and flashy moments. Energy is plentiful if consuming heavily.
Wei, Dry Earth, Wood Vault. Captures Wood Qi; warm but with a quality of gathering. Leaning towards stable accumulation, slowly settling.
Shen, Yang Metal, Metal's Lu Position. Crude Metal, crisp and sharp. Mainly for sorting, selection, and competition. Suited for reviewing decisions and making cuts.
You, Yin Metal, Metal's Prosperous Land. Refined jewelry-like Metal, gathered purity. Focused on the fine, rules, and judgment. Values nuance and boundaries.
Xu, Dry Earth, Fire Vault. Captures Fire Qi; dry yet hard. Brings its own control and cleaning power; many old matters finished or settled here.
Hai, Yin Water, Water's Lu Position. Misting still water, deep concealment. Thoughts directed inward, rich imagination. Suited for quiet planning.
Branches possess more than one layer of Five Elements; inside, Hidden Stems interlock. This is why the same Earthly Branch, in different charts, holds vastly different imagery.
IV. The Stem-Branch Pairing: The True Viewpoint
Looking at a single Stem or Branch alone is just basic symbolism. Real imagery comes from their combination.
Consider a simple example: Jia Wood sitting on Yin. Jia Wood unfurls outward on the Stem; Yin Wood is its root below, filling the inner base. Inner backing is ample, thought and action echoing each other; desires grounded by support.
If Jia Wood sits on Shen? The Stem wants to reach upward, but Shen Metal below clutches it. Outward ambition exists but inner life faces constraints, ideas often restricted by reality.
This is the logic of Stem-Branch echo. What a Stem wants to do depends on whether the Branch supports it; what Qi resides there requires a Stem to reveal the secret to the world.
V. One Modern Example
Two people, both with Day Master Ding Fire. The first Ding Fire sits on the Stem, Branch is Si Fire. Candle fire fed by a hearth fire; inner drive continuous. Ready to deep-dive long-term, endure loneliness, slowly accumulate. Results seen over duration.
The second Ding Fire on Stem, Branch is Hai Water. Candle above, water below. Heart full of worries, many ideas, plans often interrupted by external shifts. Hard to stay stable in one thing.
Both are Ding Fire, just distinct because the seated Earthly Branch differs. Actions take on two different states.
VI. Six Common Mistakes for Beginners
First, treating Stems and Branches as independent sets of symbols. Reading only Stems means seeing the surface but missing the supporting foundation.
Second, assuming one Branch is "good" or "bad." Branches are just a state of Qi; quality depends on the whole chart's preference (Xu/Ji: Like vs. Dislike), and if Elements nurture each other, or clash and balance.
Third, memorizing symbols and forcing them into life. Images are reference, not fixed answers. Same Shen Metal, if pattern prefers Metal, stands for clear decision; if pattern disdains Metal, represents competitive loss.
VII. Closing Chatter
Ten Heavenly Stems, Twelve Earthly Branches—marks crafted by ancients to record the flow of Heaven and Earth Qi. Stems record outward, manifested flow; Branches record the sequential, hidden Qi absorbed in space and time.
Learning BaZi begins with understanding these symbols' true meanings. No need to rush to judge gains or losses first. Distinguish which part is external surface others see, which anchors the inner foundation for living.
Qi has inner/outer, Image has hidden/shown. Understanding Stem-Branch division is what opens the door to BaZi.
Articles in this column are for cultural and educational purposes only and do not constitute life advice.