If BaZi clashes are about elemental energy being forced apart and released, combinations are about elemental energy being drawn together and transformed. Understanding both is essential for reading a chart accurately — and combinations tend to be the more underexplained of the two, perhaps because their effects are subtler and more context-dependent.
A BaZi combination doesn’t simply add two elements together. It produces a new elemental quality that can be stronger than either original element, or can neutralize elements that would otherwise be beneficial, or can bind energy in ways that prevent it from functioning as expected. Combinations are how BaZi charts become more than the sum of their parts — and misreading them (or missing them entirely) is one of the most common ways to misread a chart.
Heavenly Stem Merges: The Five Combinations
There are five Heavenly Stem combination pairs, each producing a transformed element when they appear in adjacent or proximate positions within a chart.
Jiǎ-Jǐ merge → Earth. Yang Wood and Yin Earth combine to produce Earth as the resulting element. This is considered a transformation to stable, reliable Earth energy. In a chart, when Jiǎ and Jǐ appear in adjacent pillars, their combined effect shifts toward Earth quality — even if Wood and Earth were previously in a control relationship within the chart. The merge neutralizes the Wood-controls-Earth dynamic between them and replaces it with productive Earth energy.
Yǐ-Gēng merge → Metal. Yin Wood and Yang Metal combine to produce Metal. This is a particularly strong merge because Metal normally controls Wood — yet when these two stems merge, they transform together into Metal rather than simply sustaining a control dynamic. This merge is sometimes described as the “righteous” merge, implying a kind of clarifying transformation.
Bǐng-Xīn merge → Water. Yang Fire and Yin Metal combine to produce Water. This is among the more counterintuitive merges — Fire and Metal are in a control relationship (Fire controls Metal), yet their merge produces Water, which is neither’s native element. The transformation here is substantial: the chart gains Water quality from the interaction of two elements that would otherwise be in tension.
Dīng-Rén merge → Wood. Yin Fire and Yang Water combine to produce Wood. Water controls Fire — yet their merge produces Wood, the element that Water naturally feeds. The result is a productive rather than destructive outcome from what would otherwise be a control relationship.
Wù-Guǐ merge → Fire. Yang Earth and Yin Water combine to produce Fire. Earth controls Water — yet the merge transforms them into Fire, which Earth naturally produces. Again, the merge transcends the control dynamic and produces something neither element is.
When Stem Merges Activate
Stem merges require the two stems to be in a position where they can interact — typically adjacent pillars (Year-Month, Month-Day, Day-Hour) rather than across a gap (Year-Day). Distance weakens the merge. Additionally, a stem merge can be “broken” by the presence of a third element that clashes or otherwise disrupts one of the merging stems. If the Jiǎ stem that would merge with Jǐ is also being clashed by another Gēng Metal stem in the chart, the merge may not fully activate.
The consequence of a successful stem merge is that the merging stems lose some of their original elemental function. A Jiǎ Wood stem that merges with Jǐ Earth is less available to perform Wood functions in the chart — its Wood quality is partially consumed in the transformation. For a Day Master relying on that Jiǎ Wood for support, this can subtly undermine what appears to be a resource.
Branch Combinations: Three Types
Earthly Branch combinations are more varied than stem merges, and they operate across three distinct mechanisms.
The Six Combinations (六合, Liù Hé)
The six branch combination pairs each produce a specific elemental result through an intimate pairing:
Zǐ-Chǒu (Rat-Ox) → Earth. Water and Earth branches combine to produce Earth. This is sometimes described as the Water being “absorbed” into the Earth, producing fertile, nourishing Earth quality.
Yín-Hài (Tiger-Pig) → Wood. Wood and Water branches combine to produce Wood — Water feeds Wood, and their combination strengthens the Wood result.
Māo-Xū (Rabbit-Dog) → Fire. Wood and Earth combine to produce Fire — the Wood ignites against the Earth’s container, producing Fire.
Chén-Yǒu (Dragon-Rooster) → Metal. Earth and Metal combine to produce Metal — Earth generates Metal, and together they strengthen this result.
Sì-Shēn (Snake-Monkey) → Water. Fire and Metal branches combine to produce Water — the Metal within Shēn nourishes Water; the Fire-Water tension of Sì transforms into Water through the combination.
Wǔ-Wèi (Horse-Goat) → Fire (or Earth). Fire and Earth combine. This combination is sometimes read as producing Fire and sometimes as producing Earth depending on the chart context and school of thought.
Six combinations bind energy in their paired pillars. When two of these branch pairs appear across your chart — for example, a Rat (Zǐ) in your Year Pillar and an Ox (Chǒu) in your Month Pillar — they are drawn toward each other, and the Zǐ-Chǒu combination produces Earth quality that influences both pillars. Like stem merges, the combination can weaken the original elemental function of both branches in favor of the combined result.
The Three Harmonies (三合, Sān Hé)
The Three Harmony combinations are three-branch groups that share an elemental affinity and, when fully assembled, produce a powerful version of their shared element. These are the most significant branch combinations in BaZi.
Water Frame: Shēn-Zǐ-Chén (Monkey-Rat-Dragon). When all three appear in a chart, they form a powerful Water combination. The Rat (Zǐ) is the “emperor” of this group — its presence is most critical. Even two of the three together (particularly with the Rat) creates a partial harmony that strengthens Water.
Wood Frame: Hài-Māo-Wèi (Pig-Rabbit-Goat). The Rabbit (Māo) is the emperor. When assembled, this trio produces strong Wood energy.
Fire Frame: Yín-Wǔ-Xū (Tiger-Horse-Dog). The Horse (Wǔ) is the emperor. A strong Fire combination when complete.
Metal Frame: Sì-Yǒu-Chǒu (Snake-Rooster-Ox). The Rooster (Yǒu) is the emperor. A strong Metal combination when complete.
Three Harmony formations are powerful enough to change the overall elemental balance of a chart significantly. A chart with a complete Water Frame among its branches has substantial Water even if the Heavenly Stems don’t show much Water. This matters enormously for assessing the Day Master’s environment — and for understanding why two people with the same Day Master can have dramatically different elemental realities.
Partial harmonies (two of the three branches present, particularly including the emperor branch) still produce some of the combined elemental effect, though with less intensity. When an Annual or Luck Pillar brings in the missing third branch, the partial harmony can suddenly complete — a common mechanism for significant elemental shifts in a given year or decade.
The Three Combinations (三會, Sān Huì)
The Three Combination groupings are seasonal — they represent the three months that form each season in the Chinese solar calendar, and when assembled in a chart, they produce the season’s dominant element with particular strength.
Spring Wood: Yín-Māo-Chén (Tiger-Rabbit-Dragon). The three months of spring, producing strong Wood.
Summer Fire: Sì-Wǔ-Wèi (Snake-Horse-Goat). The three months of summer, producing strong Fire.
Autumn Metal: Shēn-Yǒu-Xū (Monkey-Rooster-Dog). The three months of autumn, producing strong Metal.
Winter Water: Hài-Zǐ-Chǒu (Pig-Rat-Ox). The three months of winter, producing strong Water.
Three Combinations are considered even more powerful than Three Harmonies by some practitioners, because they represent not just elemental affinity but seasonal momentum — all three branches pushing in the same seasonal direction simultaneously.
Combinations and Clashes in the Same Chart
One of the most important principles in combination analysis is what happens when a combination and a clash both involve the same branch. If a branch is pulled into a combination on one side and clashed on another, the resulting elemental dynamic is unstable — neither the combination nor the clash operates cleanly. This produces what practitioners sometimes call a “broken combination”: the combining branches don’t fully merge, but the clash still disrupts.
Conversely, a combination can sometimes shield against a clash. If two branches are tightly combined and an incoming clash targets only one of them, the combined bond can partially absorb the clash’s disruptive energy. The clash still registers, but with reduced force.
Understanding BaZi clashes and combinations together is how you read the actual, operational elemental balance of a chart — not the nominal balance that appears from listing the stems and branches individually, but the dynamic balance that emerges from how they interact.
What Combinations Mean in Practice
The practical consequence of a strong combination in your chart is a concentration of the combined element that may not be immediately visible from reading stems and branches individually. A chart with a complete Water Frame in the branches has substantial Water operating regardless of what the Heavenly Stems show. This Water is influencing the Day Master, interacting with other elements, and shaping the overall chart environment — but it’s invisible unless you look at branch combinations specifically.
For Day Masters whose favorable element is Water, a Water Frame in the branches is deeply supportive — a resource that’s structural and stable rather than contingent. For Day Masters who are overwhelmed by Water, the same frame is a complicating factor that makes the chart harder to balance.
Combinations also matter in timing. When an Annual Pillar branch completes a partial harmony in your natal chart, the resulting elemental surge can be substantial and sudden — even if nothing in the annual stem appears particularly significant. Tracking whether incoming annual or Luck Pillar branches complete partial harmonies in your natal chart is one of the more specific and useful timing tools in advanced BaZi reading.
Frequently Asked Questions
Do stem merges and branch combinations interact with each other? Yes, though the interaction is complex. A stem merge that produces a particular element can strengthen a branch combination seeking the same element, or vice versa. Conversely, if a branch combination produces an element that clashes with a merging stem’s result, the two transformations can partially cancel each other. Reading combinations and merges together rather than in isolation is what distinguishes more experienced BaZi analysis.
Can combinations change my Day Master’s effective element? In rare cases, yes. When a Day Master is involved in a stem merge with an adjacent pillar’s stem, and the merge transforms the Day Master’s element into a different one, this is called a “transforming Day Master” — one of the more advanced and contested topics in BaZi. Most practitioners apply this only when the transformation element is extremely strong throughout the chart, not simply because the merge pair is present.
How do I know which combinations are active in my chart? The most reliable approach is to list all four of your Earthly Branches and check them against the combination tables above: six combination pairs, three harmony groups, and three combination groupings. Note which pairs or groups are complete or partial. Then check your current Luck Pillar and Annual Pillar branch — do any incoming branches complete partial harmonies in your natal chart? This year-by-year tracking of “what completes” is a significant portion of practical BaZi timing analysis.