Gai Tou and Jie Jiao Effects on Strength (蓋頭截腳對旺衰的影響)
Understand Gai Tou and Jie Jiao as school terms for controlling stem-branch relations within a pillar and how roots, season, and other support modify their effect.
Overview
Gai Tou and Jie Jiao (蓋頭、截腳) are school-specific labels for a controlling relation between a pillar’s Heavenly Stem and Earthly Branch: commonly the stem controls downward in 蓋頭, while the branch’s governing qi controls the stem above in 截腳. The labels suggest constrained support or expression, not automatic destruction. Exact stem, branch, hidden qi, season, roots elsewhere, and lineage definitions must be checked.
At a glance
- 蓋頭
- Often the stem controls the branch below
- 截腳
- Often governing branch qi controls the stem above
- Scope
- A within-pillar control relation
- Modifiers
- Season, roots elsewhere, generation, and combinations
- Variation
- Terminology differs among schools
- Limit
- Constraint does not mean automatic destruction
Define the adopted direction before using the label
Many modern schools use 蓋頭 for a stem controlling its branch and 截腳 for branch qi controlling the stem. Other authors may broaden or reverse parts of the terminology.
State the exact stem, branch, governing hidden qi, and direction of control. The label alone is not auditable.
- Publish the school definition.
- Show the actual controlling relation.
Assess constrained availability, not deletion
Control within a pillar can make support less direct or expression less stable, especially when the controlled side lacks season and reinforcement.
Roots elsewhere, generation, exposure, or a stronger seasonal route can preserve the controlled force.
- Grade constraint by context.
- Search for reinforcement elsewhere.
Apply the effect to the correct side of the balance
Determine whether the controlled stem or branch would otherwise support, drain, or control the Day Master. The same configuration can raise or lower net Day Master strength depending on that relation.
Do not attach one fixed favorable or unfavorable meaning to every pillar.
- Resolve the target relation first.
- Recalculate the net balance.
Avoid literal “head” and “feet” predictions
The terms do not diagnose head, leg, mobility, hierarchy, oppression, or family conflict. They are structural shorthand.
Medical or safety claims require evidence outside the chart.
- No body-part diagnosis.
- No automatic interpersonal narrative.
Sources and editorial basis
- 《三命通會》 (Sanming Tonghui)《三命通會》干支同柱生克與截腳蓋頭相關論法須合藏干、根氣與得令狀態，不作一見即斷A historical compilation covering stems and branches, Ten Gods, Nayin, Shen Sha, and multiple classical pattern systems.
- 《滴天髓》 (Dripping Heavenly Marrow)《滴天髓》天干地支上下情協與否須察全局源流，單柱受制仍可由他支根助及生化補充A core later text on Bazi balance, seasonal strength, and relational reading.
- OpenFate Editorial Methodology蓋頭截腳頁先聲明採用定義再辨受限路徑，禁止字面化為肢體、家庭、職涯或財務斷裂OpenFate separates deterministic chart calculation, traditional interpretation, and modern editorial explanation.