Eight Mansions (Ba Zhai 八宅) House Direction Guide: East & West Four Groups, Luo Pan Protocol & Classical Remedies

1. Classical Origins: From Jing Fang's Hexagram Transformations to “Ba Zhai Ming Jing”

Dwellings mold destiny. Space shapes blood and breath. Throughout my decades of surveying urban shophouses, high-rise apartments, and ancestral villas, I have repeatedly witnessed families fall into sudden illness, litigation, or financial exhaustion shortly after moving into a home whose main portal clashes violently with the householder's natal trigram. Conversely, modest homes aligned harmoniously with the owner's Ming Gua (命卦) consistently nurture calm sleep, cohesive marriages, and compounding prosperity.

The term Ba Zhai (八宅 — Eight Mansions) denotes the eight directional palaces of a dwelling corresponding to the eight trigrams of the Book of Changes (I Ching 易經): Qian (乾), Kun (坤), Kan (坎), Li (離), Zhen (震), Xun (巽), Gen (艮), and Dui (兌). Far from being a simplistic folk superstition, Eight Mansions rests upon the Han-dynasty mathematical architecture of Jing Fang's Eight-Palace Hexagram Transformations (京房八宮卦變), Tang monk Master Yi Xing's (一行禪師) compass formulas, and the two crowning Qing-dynasty manuals: Ba Zhai Ming Jing (八宅明鏡, 1790) by Gu Wulu and Yang Zhai San Yao (陽宅三要, 1786) by Zhao Jiufeng.

「人之福壽全賴陽宅，宅之吉凶全由門主灶，而門主灶之吉凶全視宅主之命卦。」

“Human longevity and fortune depend entirely upon the Yang Dwelling; the auspiciousness or adversity of the dwelling rests upon the Door, Master Bed, and Stove; and the judgment of those Three Essentials takes the householder's Ming Gua as its sovereign touchstone.”

— Ba Zhai Ming Jing (八宅明鏡 · Scroll 1: Treatise on Matching Ming Gua to the Dwelling)

2. Exact Mathematical Formulas for the Ming Gua (Cung Phi) & Solar Term Boundaries

Wrong palace, wrong compass. When auditing house directions in Eight Mansions, you must never use the Birth Palace (Cung Sanh) or the Sexagenary Na Yin Element alone; you must compute the Ming Gua (命卦 — Destiny Trigram, called Cung Phi in Vietnamese). Because male Qi progresses forward from 1 Kan Water while female Qi progresses backward from 5 Central Earth along the Lo Shu square, a man and a woman born in the exact same solar year possess entirely different Ming Gua trigrams!

2.1. Step-by-Step Ming Gua Calculation for 20th & 21st Century Births

First, verify the solar year of birth using the astronomical boundary of Li Chun (Beginning of Spring, ~February 4)—and note that in the lineage preserved on our platform, births occurring between Li Dong (Beginning of Winter, ~November 7–8) and Li Chun are cross-referenced with the following year's palace in brackets. Let R be the single-digit root obtained by summing the last two digits of your birth year until a single digit from 1 to 9 remains:

• For individuals born between 1900 and 1999:
  • Male (1900–1999): Ming Gua Number = 10 − R (If the result is 5, a male is assigned to 2 Kun Earth).
  • Female (1900–1999): Ming Gua Number = R + 5 (If greater than 9, subtract 9; if the result is 5, a female is assigned to 8 Gen Earth).
• For individuals born from 2000 to 2099:
  • Male (2000–2099): Ming Gua Number = 9 − R (If 0, take 9 Li Fire; if 5, assign to 2 Kun Earth).
  • Female (2000–2099): Ming Gua Number = R + 6 (If greater than 9, subtract 9; if 5, assign to 8 Gen Earth).

Worked Verification Examples: For a person born in 1985 (Yi Chou), sum the last two digits: 8 + 5 = 13 → 1 + 3 = 4 (so R = 4). A 1985 Male has 10 − 4 = 6 (Qian Metal — West Four Group); a 1985 Female has 4 + 5 = 9 (Li Fire — East Four Group). You can compute and print an instant A4 family chart using our interactive Ming Gua & Eight Mansions Palace Calculator.

3. Five-Element Physics of the East Four Group vs. West Four Group on the Later Heaven Bagua

Why does Eight Mansions divide the eight trigrams specifically into the East Four Group (東四宅/命) and the West Four Group (西四宅/命)? The answer lies in the pure Five-Element generative loop embedded inside King Wen's Later Heaven Bagua:

• The East Four Elemental Loop (Kan 1 Water · Zhen 3 Wood · Xun 4 Wood · Li 9 Fire): Look at their Five Elements: Kan Water (1) nourishes Zhen Wood (3) and Xun Wood (4), and Wood in turn feeds Li Fire (9)! Every interaction inside the East Four family is either mutual generation (Sheng 生) or elemental sibling harmony (Bi He 比和).
• The West Four Elemental Loop (Kun 2 Earth · Gen 8 Earth · Qian 6 Metal · Dui 7 Metal): All four trigrams belong exclusively to Earth (Kun 2, Gen 8) and Metal (Qian 6, Dui 7). Earth generates Metal, Earth supports Earth, and Metal supports Metal! Zero internal conflict exists within the West Four family.
• Why Cross-Group Mixing Sparks Conflict: The instant an East Four person occupies a West Four house (or vice versa), elemental warfare erupts: West Metal (Qian 6, Dui 7) chops East Wood (Zhen 3, Xun 4); West Earth (Kun 2, Gen 8) dams East Water (Kan 1); and East Fire (Li 9) melts West Metal (Qian 6, Dui 7). Hence the classical commandment: “East and West must never be confounded” (東西不可混雜).

4. Yao Line-Transformation Mechanics Generating the Eight Wandering Stars (Ba You Nian)

Each Bagua trigram consists of three horizontal Yao lines: Bottom Line 1 (Earth 爻), Middle Line 2 (Human 爻), and Top Line 3 (Heaven 爻). Taking the homeowner's Ming Gua trigram as the unchanging base (Fu Wei 伏位) and systematically flipping Yang solid lines into Yin broken lines (and vice versa) across the three positions generates the Eight Wandering Stars (Ba You Nian 八遊年)—four auspicious and four inauspicious:

5. Complete 64-Combination Reference Matrix: 8 Ming Gua × 8 Compass Directions

Use this master lookup table to cross-reference any homeowner's Ming Gua against all eight compass directions instantaneously:

6. Field Luo Pan Protocol: Standing Inside Looking Out, Apartments & Void Lines

One of the most frequent technical questions I receive from homeowners is: “When holding a compass or Luo Pan to measure my house direction, do I stand inside looking out, or stand on the street looking in?” If you reverse this step, your Sitting and Facing palaces are flipped 180 degrees and the entire audit is invalidated.

Orthodox Rule: You must ALWAYS stand INSIDE the house looking straight OUT through the main entrance!

• Why Stand Inside Looking Out? A Yang Dwelling is modeled after a living human body: the rear wall is its spine (Sitting Mountain / Tọa Sơn), and the front main door is its mouth and eyes (Facing Direction / Hướng Khẩu) that inhale sunlight, wind, and vitality from the front Bright Hall. Standing inside looking out aligns your compass baseplate with the house's own line of sight.
• Eliminating Steel & Rebar Magnetic Distortion: Modern security doors, rolling steel shutters, reinforced concrete columns, and wristwatches deflect a magnetic needle by 5° to 25°. Remove metal watches, step back 1.5m to 2.0m inside the house along the perpendicular axis of the door, and take three readings along that line. Only when all three readings agree within ±1° is the bearing true.
• High-Rise Apartments (Floor 1–5 vs. Floor 6+): For ground-level townhouses and apartments on Floors 1–5, the unit entrance door governs Ba Zhai Door direction. For high-rise units from Floor 6 upward, where the interior corridor is enclosed and windowless while the Largest Living-Room Balcony drinks in sky light and wind, audit the Balcony Facing for Xuan Kong Flying Stars while simultaneously checking the Unit Entrance Door for Ba Zhai personal compatibility.

7. Yang Zhai San Yao: Orchestrating the Three Essentials (Main Door, Bed & Stove)

In Yang Zhai San Yao (陽宅三要), Zhao Jiufeng demonstrates that a home's destiny is governed by the triad of Men (門 — Main Door, 40%), Zhu (主 — Master Bedroom & Bed, 35%), and Zao (灶 — Kitchen Stove, 25%):

• Main Door (Men): Should open in one of your four auspicious palaces (Sheng Qi, Tian Yi, Yan Nian, or Fu Wei).
• Master Bed (Zhu): Place the master bedroom in an auspicious palace of the floor plan (Macro-Taiji), and position the bed within that room (Micro-Taiji) with the headboard against a solid wall pointing toward your personal Tian Yi (for healing) or Yan Nian / Sheng Qi (for marital harmony and fertility).
• Kitchen Stove (Zao — “Sit on Sha, Face Auspiciousness” 坐凶向吉): Place the physical body of the stove inside one of the four inauspicious sectors (Jue Ming, Wu Gui, Liu Sha, Huo Hai) so its Yang Fire incinerates negative Qi, while orienting the Stove Mouth / Control Knobs (the direction the cook's back faces while standing at the stove) toward one of the homeowner's four auspicious directions!

8. Four Orthodox Cures When Your House Faces Jue Ming, Wu Gui, Liu Sha, or Huo Hai

What if you have already purchased a house whose main entrance faces Jue Ming, Wu Gui, Liu Sha, or Huo Hai? Do not panic. Classical Ba Zhai Ming Jing provides four structural and elemental remedies that neutralize an afflicted entrance without tearing down walls:

1. The Classical Stove Counter-Cure (“When the Door Is Weak, a Thriving Stove Rescues the Home”):
   • Main Door at Jue Ming (Po Jun Metal): Point the Stove Mouth toward Tian Yi (Ju Men Earth). Benevolent Yang Earth generates and tames Po Jun Metal, protecting life and health.
   • Main Door at Wu Gui (Lian Zhen Fire): Point the Stove Mouth toward Sheng Qi (Tan Lang Wood). Pure Yang Wood transforms virulent Five-Ghost Fire into scholarly and commercial brilliance.
   • Main Door at Liu Sha (Wen Qu Water): Point the Stove Mouth toward Yan Nian (Wu Qu Metal). Righteous Metal governs Peach-Blossom Water, restoring marital fidelity and ending lawsuits.
   • Main Door at Huo Hai (Lu Cun Earth): Point the Stove Mouth toward Fu Wei (Zuo Fu Wood). Wood controls stagnant Lu Cun Earth, restoring household peace.
2. Threshold Five-Element Doormat Drainage: Drain the visiting bad star right at the front threshold: use a Navy Blue / Black mat (Water) to drain a Jue Ming (Metal) door; an Earth-Tone Yellow / Brown mat + ceramic vase (Earth) to drain a Wu Gui (Fire) door; a Green mat + pair of Lush Plants (Wood) to drain a Liu Sha (Water) door; and a Silver-Grey / White mat with Six Emperor Coins underneath (Metal) to drain a Huo Hai (Earth) door.
3. Secondary Entrance Redirection or the “Three Good Conquer One Bad” Rule: Use a side/garage door located in Sheng Qi or Yan Nian as the primary daily entrance, and ensure 100% of the Master Bed, Stove Mouth, and Ancestral Altar sit in auspicious palaces.

8B. Room-by-Room Architectural Deployment Across All 8 House Facings (Ba Zhai Zhai Gua)

Every house has its own natal trigram—its Zhai Gua (宅卦 — House Trigram)—determined by its Sitting Mountain (Tọa Sơn, the rear wall opposite the facing direction). Below is the complete architectural deployment manual for all eight house types under Ba Zhai Ming Jing and Yang Zhai San Yao:

8B.1. Resolving the “Sitting vs. Facing Paradox” in East–West Diagonal Dwellings

Have you ever noticed a subtle structural paradox in the table above? Look closely at the four cardinal and diagonal axes:
• On the North–South Axis (Kan 1 – Li 9), both ends belong to the East Four Group. Whether a house sits North facing South or sits South facing North, its Sitting Trigram and Facing Trigram are 100% East Four.
• On the Northeast–Southwest Axis (Gen 8 – Kun 2), both ends belong to the West Four Group. Whether a house sits Northeast facing Southwest or sits Southwest facing Northeast, both its Sitting and Facing palaces are 100% West Four.
• However, on the East–West Axis (Zhen 3 – Dui 7) and the Southeast–Northwest Axis (Xun 4 – Qian 6), one end is East Four while the opposite end is West Four! For example, a house facing Northwest (Qian — West Four Facing) automatically has its rear sitting wall in the Southeast (Xun — East Four Sitting).
How does classical metaphysics resolve this? In Yang Zhai San Yao, Zhao Jiufeng explains that the Facing Direction (the Main Door / Môn) governs dynamic external Qi intake, while the Sitting Mountain (Tọa Sơn) governs internal structural root. When a husband and wife belong to different groups (one East Four, one West Four), a house along the East–West or Southeast–Northwest axis is actually a hidden blessing: one spouse harmonizes with the Facing Door while the other spouse harmonizes with the Sitting Palace and rear Master Bedroom!

9. Synthesizing Eight Mansions (Substance) with Period 9 Flying Stars 2024–2043 (Function)

Ba Zhai is the spatial body; Xuan Kong is the temporal pulse. Never practice one while ignoring the other. When an auspicious Ba Zhai palace for the homeowner simultaneously hosts an auspicious Period 9 or 2027 Ding Wei Annual Flying Star—such as 1 White in the Northwest, 4 Green in the South, 8 White in the Southeast, or 9 Purple in the Center—prosperity multiplies exponentially. Conversely, if your personal Sheng Qi sector happens to host the annual 5 Yellow Great Sha (Due North in 2027) or Three Killings + 2 Black (Due West in 2027), you must first install brass remedies (6-rod windchime in North, Brass Wu Lou in West) and refrain from renovation during that year.

10. Empirical Field Case Study & 10-Step Professional Home Audit Checklist