Classical Eight Mansions doctrine reads the SE octant as one of Kua 9’s four favourable directions, specifically carrying the Tian Yi (天醫) assignment — health, recovery, doctors and medicine.
Configuration
- Mountain: 巳 (Sì) — SE octant, position 3 of 3, 142.5° – 157.5°
- Mountain type: branch · yin fire element, yin polarity
- Personal kua: Kua 9 (離 Li) — East Life Group, natural direction S
- Eight Mansions assignment: Tian Yi (天醫) — favourable
- Eight Mansions domain: Health, recovery, doctors and medicine
Sì (巳) mountain context
Sì (巳) is the third of three mountains in the SE octant (degrees 142.5° to 157.5° on the compass). It is a earthly-branch mountain, classified as yin fire (yin). Domain: Snake-hour fire, late morning ascent, concealed brilliance.
Classical 三合 (San He / Three Combining) doctrine pairs 巳 with 酉 + 丑 as the trine grouping. Properties whose facing falls on 巳 can be read alongside the trinity branches for additional refinement during a full audit.
Kua 9 (Li) context
Kua 9 (離 Li) people belong to the East Life Group (東四命), with natural direction S (the fire-element trigram register). Kua 9 (Li) people are East Life Group — born under the Li trigram (fire, south). Thrive in S / SE / E / N facing properties; should avoid NE / SW / W / NW.
Sì mountain read for Kua 9 Li
Classical Eight Mansions doctrine reads the SE octant as one of Kua 9’s four favourable directions, specifically carrying the Tian Yi (天醫) assignment — health, recovery, doctors and medicine.
What this means in practice: a property whose facing direction falls on 巳 mountain (within the SE octant), occupied by a Kua 9 Li person, is read under classical Eight Mansions doctrine as carrying the Tian Yi register — health, recovery, doctors and medicine. The favourable register is one of four favourable octants this kua has; the other three carry Sheng Qi (career), Tian Yi (health), Yan Nian (relationships), and Fu Wei (stability) assignments depending on the kua. The specific assignment for SE for Kua 9 is Tian Yi.
Refinement within the octant: Sì sits at position 3 of 3 within the SE octant. The SE octant has three mountains; classical doctrine applies the same Eight Mansions assignment to all three at the octant level, but specific-mountain refinements come from polarity matching (yin mountain vs yang mountain), san he trine groupings, and the mountain’s type (stem vs branch vs trigram). For a Kua 9 person, a yin mountain like Sì pairs differently with the kua's fire register than the octant's yang mountains do.
Why this is one input among four
The mountain-kua reading describes Eight Mansions doctrine’s baseline register only. The full audit also requires precise compass-degree facing measurement, the property’s Xuan Kong period chart, and integration across all occupants’ kuas. Master Sean Chan’s feng shui audit integrates all four layers on-site against your specific property.