Half Combinations: Birth-Place Half, Tomb Half, and Arch Combination Explained • TIMEACTOR

Three Types of Half Combinations

A Three-Harmony missing one leg — which leg is missing determines how much force remains

A full Three-Harmony (sanhe) needs all three branches. In practice, you often only get two — that's a half-combination (半合, banhe). Three types: Birth-Place Half (shengdi banhe) — missing the tomb/storage branch (e.g., Shen-Zi missing Chen). Strongest, because both the birth-source and the peak-center are present. Tomb Half (mudi banhe) — missing the birth-source (e.g., Zi-Chen missing Shen). Mid-strength, has peak and storage but no source. Arch Combination (gonghe) — missing the center/peak branch (e.g., Shen-Chen missing Zi). Weakest because the core is absent, but has hidden-arch power. Force ratio: Birth-Place Half (70%) > Tomb Half (50%) > Arch Combination (30%).

Three half-combination types: Birth-Place Half (source + peak, 70% force), Tomb Half (peak + storage, 50%), Arch Combination (source + storage, missing center, 30% + hidden-arch effect). Missing the center gives the weakest sustained force but the strongest manifestation-year burst.

1. Birth-Place Half — source and peak both present

Birth-Place Half is the strongest half-combination. Example: Shen-Zi-Chen forms Water. Shen (birth source) and Zi (peak center) are both present, only Chen (tomb) is missing. Shen-Zi half-Water carries roughly 70% of full Three-Harmony Water force. No tomb needed — the source feeds the peak directly, force transmission is clean. A person with Shen-Zi half-Water has strong mental acuity (Water) because both the source (Shen) and core (Zi) are in place. When luck cycles bring Chen → Three-Harmony completes → Water force spikes → sudden burst of insight or intuition that year.

2. Tomb Half — peak present but source missing

Tomb Half example: Zi-Chen half-Water — peak (Zi) and tomb (Chen) present, birth source (Shen) absent. Force is about 50% of full combination. A Tomb Half person has the perception and expression of the peak element, but lacks sustained supply — no birth source continuously feeding. They have talent in the relevant domain but may lack stamina — accumulation isn't sustained. When luck cycles bring Shen → source gets plugged in → Three-Harmony completes → the backup supply kicks in, performance becomes consistent.

3. Arch Combination — center missing but invisibly arched

Arch Combination example: Shen-Chen missing Zi — only the birth source and tomb exist, the core peak-center is absent. Force is only about 30% of full combination. But Arch Combination has something the other two don't: hidden-arch power. Shen-Chen, though weak, invisibly 'arch up' a phantom Zi water. When luck cycles hit Zi, this phantom suddenly materializes — the surprise or shock is stronger than a normal half-combination completing. So don't judge Arch Combination by its 30% baseline alone — factor in the manifestation-year explosion bonus.

4. Practical application: marking completion years

For any half-combination in the chart, mark the year the missing branch arrives in annual luck. Birth-Place Half completing (tomb arrives) → the element's expression becomes 'storable' and sustainable. Tomb Half completing (source arrives) → stamina and continuity finally kick in. Arch Combination completing (center arrives) → the biggest single-year effect — a latent force explodes into visibility. These completion years are prime event-timing targets. The completed element's corresponding life domain sees a step-change.

How to Approach This Concept

Career & Wealth

Birth-Place Half in the month pillar with Wealth element suggests career income that's strong but not yet fully 'bankable' — the tomb (storage) is missing. When the completion year arrives, wealth accumulation capability jumps. Tomb Half with Wealth suggests you can hold money but the source of income isn't fully reliable — completion year plugs the supply gap.

Love & Relationship

Arch Combination involving the spouse palace (day branch) signals a relationship where something essential is 'missing but felt.' Partners may sense an unspoken absence. When the arched branch manifests, that missing element either arrives (a new dimension to the relationship) or forces acknowledgment of what was absent.

Personality

People with predominantly Tomb Half combinations tend to have ability without consistent follow-through. They're talented in bursts. Birth-Place Half types have sustained capability but may lack the 'storage' instinct — good at generating, bad at preserving. Arch Combination types live with a constant sense of something not-yet-here — driven by anticipation.

Health

Half combinations involving the Day Master's element need monitoring. A Tomb Half where the Day Master's source is missing means the body's energy supply chain is incomplete — fatigue may be chronic until the completion year. An Arch Combination where the Day Master's peak-center is absent means vitality is always running below potential until manifestation year.

Source Texts

Practical Takeaways

Mark Three-Harmony completion years: For every half-combination in the chart, mark the year the missing branch arrives. Completion year = the corresponding element's domain sees a 'completeness' feeling and force spike.
Pay double attention to Arch Combination manifestation: Arch Combination (missing center) manifestation hits harder than other half-combination completions — hidden-arch power surfaces suddenly. Whether good or bad, the impact is outsized.
Don't treat half-combination as full transformation: A half-combination cannot transform (hehua). Only a complete Three-Harmony or Three-Meeting can transform the element. A half-combination is just a 'directional tendency' — the element's force in that direction is amplified but the element itself doesn't convert.

Follow-up Questions

Q:Can a half-combination transform the element?

No. Half-combinations cannot transform (hehua). Only complete Three-Harmony or Three-Meeting combinations can change the elemental nature. A half-combination is just a force tendency — the element in that direction gets amplified but doesn't convert to a new element.

Q:What if multiple half-combinations exist in one chart?

Each operates independently with its own completion years. If two half-combinations share a missing branch that arrives in the same year, that year gets a double completion effect — two life domains shift simultaneously. These are major transition years.