Birth-Stage Half Trine (生地半合)
Learn the four birth-to-cardinal half-trine pairs, why the cardinal branch anchors phase direction, and what season, roots, missing storage, and clashes change.
Overview
Birth-Stage Half Trine (生地半合) joins the birth and cardinal branches of a Three-Harmony group: Shen–Zi Water, Yin–Wu Fire, Hai–Mao Wood, or Si–You Metal. The cardinal branch gives clear phase direction, but the storage member remains absent. Season, roots, exposure, distance, and damage decide practical force.
At a glance
- Pairs
- Shen–Zi, Yin–Wu, Hai–Mao, and Si–You
- Members
- Birth stage plus cardinal center
- Missing
- The storage branch of the full trine
- Boundary
- Two branches do not equal a complete trine
- Center
- The cardinal branch must be one of the two present members
- Timing
- Arrival of the storage member can complete the set temporarily
Use only birth-to-cardinal pairs
Match the pair to its Water, Fire, Wood, or Metal parent trine.
Do not classify birth-to-storage pairs as canonical half trines without declaring another school rule.
- Name the parent group.
- Record the absent storage member.
Let the cardinal branch anchor direction
The center branch provides a clearer phase focus than two arbitrary group members.
Season, roots, exposure, and proximity still determine whether that direction becomes usable.
- Identify the cardinal center.
- Test phase support.
Audit clashes and competing groups
Either member may enter harmony, meeting, punishment, harm, break, or clash.
State which structure occupies or damages a branch and preserve residual status.
- Map all overlaps.
- Do not double-count force.
Keep the missing member missing
A future branch may complete the trine only during that timing layer.
生地半合 alone cannot prove a relationship, opportunity, illness, movement, or success.
- No imagined third branch.
- No event guarantee.
Sources and editorial basis
- 《三命通會》 (Sanming Tonghui)《三命通會》卷二地支三合：生支與旺支同見屬生地半合，力量與完整三合及墓地半合有別A historical compilation covering stems and branches, Ten Gods, Nayin, Shen Sha, and multiple classical pattern systems.
- 《淵海子平》 (Yuanhai Ziping)《淵海子平》三合與半合諸論：生旺兩支借中神定向，仍須察月令、距離及第三支是否到位A foundational Ziping reference for branch months, hidden stems, roots, and stem-branch relationships.
- OpenFate Editorial Methodology生地半合頁明確要求生支加中神，將關係強度、目標五行支持與歲運補足分開OpenFate separates deterministic chart calculation, traditional interpretation, and modern editorial explanation.