Why do the first 4 hexagrams of the Kun Palace share Gua Qi 1, while the last 4 change their Gua Qi number?

Because in Xuan Kong Da Gua, a hexagram's spatial Gua Qi number (1–9) is governed 100% by its Upper (Outer) Trigram. In the Jing Fang transformation sequence, the Pure Root, 1st Generation, 2nd Generation, and 3rd Generation only flip lines in the Lower (Inner) Trigram, preserving Kun ☷ on top (Gua Qi 1). In the 4th Generation, 5th Generation, Wandering Soul, and Returning Soul, the line changes move into the Upper Trigram, shifting their spatial Gua Qi while retaining their Kun Palace ancestral soul.

Which hexagrams in the Kun Group (Earth ☷ · Khôn Cung) are strongest for Period 9 (2024–2043)?

For Sitting Mountain, high terrain, and executive backing (Direct Spirit / Chinh Than), the crown jewel is #11 Địa Thiên Thái (地天泰 ䷊), the 3rd-Generation Parent Hexagram carrying Star Period 9 at Hợi – Nhâm (337.500°–343.125°). For Main Gate, Water Mouth, and driveway intake (Indirect Spirit / Linh Than), the prime choice is #2 Khôn Vi Địa (坤為地 ䷁), the Pure Root Hexagram carrying Star Period 1 (forming 1+9=10 Sum-of-Ten with Period 9) at Nhâm – Tý (348.750°–354.375°).

How do Sum of Ten (He Shi) and Difference of Five (He Sheng Cheng) work for the Kun Group (Earth ☷ · Khôn Cung)?

All 8 Upper-Kun compass hexagrams carry Gua Qi 1. They achieve Husband-Wife Sum-of-Ten (He Shi) when paired with Qian Group ☰ (Gua Qi 9 Metal · 1 + 9 = 10), and achieve He Tu Generative Difference-of-Five (He Sheng Cheng) when paired with Gen Group ☶ (Gua Qi 6 Water · 1 – 6 = 5).

☷ XUAN KONG DA GUA · 8 TRIGRAM PALACES Gua Qi 1 · Yang Water (He Tu 1–6 Co-Ancestor Water) • Early Heaven 8 / Later Heaven 2

Kun Group (Earth ☷ · Khôn Cung) in Xuan Kong Da Gua (坤宮八卦): 8 Palace Hexagrams, 384-Yao Degrees & Period 9 Mastery

Q: Which 8 hexagrams belong to the Kun Group (Earth ☷ · Khôn Cung) in Xuan Kong Da Gua?

In the Jing Fang 8-Palace lineage, the Kun Group (Earth ☷ · Khôn Cung) comprises #2 Khôn Vi Địa (䷁), #24 Địa Lôi Phục (䷗), #19 Địa Trạch Lâm (䷒), #11 Địa Thiên Thái (䷊), #34 Lôi Thiên Đại Tráng (䷡), #43 Trạch Thiên Quải (䷪), #5 Thủy Thiên Nhu (䷄), #8 Thủy Địa Tỷ (䷇). On the San Yuan 360-degree Upper-Trigram Gua Qi compass ring, the 8 hexagrams sharing Upper Trigram Kun ☷ (all carrying Gua Qi 1 — Yang Water (He Tu 1–6 Co-Ancestor Water)) are #2 Khôn Vi Địa (䷁), #24 Địa Lôi Phục (䷗), #19 Địa Trạch Lâm (䷒), #11 Địa Thiên Thái (䷊), #36 Địa Hỏa Minh Di (䷣), #46 Địa Phong Thăng (䷭), #7 Địa Thủy Sư (䷆), #15 Địa Sơn Khiêm (䷎).

Six yielding Yin lines embrace the firmament, bearing all living things without exhaustion. In the grand cosmic wheel of Xuan Kong Da Gua (玄空大卦), the Kun Palace Group (坤宮八卦 — Nhóm Quái Khôn ☷) is the Great Mother (Lão Mẫu) and the northern foundation of Fu Xi's Early Heaven ring: holding Early Heaven Number 8 at Due North, Later Heaven Number 2 in the Southwest, and Gua Qi Number 1 (He Tu 1–6 Primordial Yang Water) on the San Yuan compass ring. Why do Grandmasters guard the secrets of the Kun Group above all others in Period 9 (2024–2043)? Because every single Upper-Kun hexagram carries Gua Qi 1—forming an automatic 1 + 9 = 10 Sum-of-Ten with Period 9—and its 3rd-generation Parent Hexagram #11 Earth Heaven Tai (地天泰 ䷊) unites Gua Qi 1 with Star Period 9 inside a single hexagram!

Master Ung Khiem (Thầy Ưng Khiêm)

Classical Feng Shui & East Asian Metaphysics Master · UK MASTER ACADEMY

Published June 24, 2026 · Updated October 15, 2026
7,800-word Scholarly Monograph · 28 min read
🇻🇳 Bản tiếng Việt

Kun Group (Earth ☷ · Khôn Cung) in Xuan Kong Da Gua Feng Shui

Core Trigram Palace Dossier: Kun Group ☷ Earth

Palace Family:

Kun Group (Earth ☷ · Khôn Cung) (坤宮八卦 · Mother / Matriarch (Lão Mẫu 老母))

Cosmic Image:

☷ Receptive Earth (Dì 地) — Trigram Element: Nurturing Yin Earth (Âm Thổ 陰土)

Early & Later Bagua:

Early Heaven #8 (Due North (Early Heaven Axis Base)) · Later Heaven #2 (Southwest (Mùi – Khôn – Thân · 202.5°–247.5°))

Da Gua Outer Qi:

Gua Qi 1 — Yang Water (He Tu 1–6 Co-Ancestor Water)

Jing Fang 8 Gua:

#2 Khôn Vi Địa (䷁), #24 Địa Lôi Phục (䷗), #19 Địa Trạch Lâm (䷒), #11 Địa Thiên Thái (䷊), #34 Lôi Thiên Đại Tráng (䷡), #43 Trạch Thiên Quải (䷪), #5 Thủy Thiên Nhu (䷄), #8 Thủy Địa Tỷ (䷇)

Upper-Kun Ring:

#2 Khôn Vi Địa (䷁), #24 Địa Lôi Phục (䷗), #19 Địa Trạch Lâm (䷒), #11 Địa Thiên Thái (䷊), #36 Địa Hỏa Minh Di (䷣), #46 Địa Phong Thăng (䷭), #7 Địa Thủy Sư (䷆), #15 Địa Sơn Khiêm (䷎)

Period 9 Crown Pair:

Direct Spirit: #11 Địa Thiên Thái ䷊ (Period 9) · Indirect Spirit: #2 Khôn Vi Địa ䷁ (Period 1)

✦ Classical Key: In Period 9 (2024–2043), the Kun Group is a powerhouse of Sum-of-Ten resonance: (1) All 8 Upper-Kun compass hexagrams carry Gua Qi 1, uniting with Qian Gua Qi 9 and Period 9 via 1+9=10; (2) #11 Earth Heaven Tai (䷊) carries Gua Qi 1 + Star Period 9 (Internal Sum-of-Ten Direct Spirit); and (3) #2 Kun Wei Di (䷁) carries Gua Qi 1 + Star Period 1 (Double-One Indirect Spirit forming Double 1+9=10 with #12 Pi!).

Executive Summary for Practitioners & AI Search (GEO Summary)

Dual Classification Mastery: In Xuan Kong Da Gua (玄空大卦), the Kun Group (Earth ☷ · Khôn Cung) is analyzed across two interlocking axes: (1) the Jing Fang 8-Palace Lineage (Bát Cung Kinh Phòng) comprising #2 Khôn Vi Địa (䷁), #24 Địa Lôi Phục (䷗), #19 Địa Trạch Lâm (䷒), #11 Địa Thiên Thái (䷊), #34 Lôi Thiên Đại Tráng (䷡), #43 Trạch Thiên Quải (䷪), #5 Thủy Thiên Nhu (䷄), #8 Thủy Địa Tỷ (䷇), and (2) the San Yuan Upper-Trigram Compass Ring comprising all 8 hexagrams with Kun ☷ as their Upper (Outer) Trigram (#2 Khôn Vi Địa (䷁), #24 Địa Lôi Phục (䷗), #19 Địa Trạch Lâm (䷒), #11 Địa Thiên Thái (䷊), #36 Địa Hỏa Minh Di (䷣), #46 Địa Phong Thăng (䷭), #7 Địa Thủy Sư (䷆), #15 Địa Sơn Khiêm (䷎)), which universally carry Gua Qi 1 (Yang Water (He Tu 1–6 Co-Ancestor Water)).
Why the First 4 Hexagrams Overlap Both Systems: In Jing Fang's 8-step line transformation, Steps 0, 1, 2, and 3 (#2 Khôn Vi Địa, #24 Địa Lôi Phục, #19 Địa Trạch Lâm, and #11 Địa Thiên Thái) transform only the Lower (Inner) Trigram while keeping Kun ☷ intact on top. Thus they hold Gua Qi 1 on the Luo Pan and belong to both lists simultaneously.
Supreme Resonance Partners: Every Upper-Kun hexagram (Gua Qi 1) locks into Sum of Ten (He Shi 合十) with the Qian Group ☰ (Gua Qi 9 Metal · 1 + 9 = 10) and locks into He Tu Generative Difference of Five (He Sheng Cheng 合生成) with the Gen Group ☶ (Gua Qi 6 Water · 1 – 6 = 5).
Period 9 (2024–2043) Mountain & Water Formula: Anchor the Sitting Mountain, CEO Office, or Master Bed on the 3rd-Generation Parent Hexagram #11 Địa Thiên Thái (地天泰 ䷊) at Hợi – Nhâm (337.500°–343.125°) (carrying Timely Star Period 9 Direct Spirit), and open the Main Gate, Driveway, or Water Mouth on the Pure Root Hexagram #2 Khôn Vi Địa (坤為地 ䷁) at Nhâm – Tý (348.750°–354.375°) (carrying Star Period 1 to complete 1 + 9 = 10 Indirect Spirit wealth intake).
Sub-Degree 384-Yao Precision: Each hexagram spans 360° ÷ 64 = 5.625°, subdivided into 6 individual lines (yao) of 0.9375° each. Always align structural centerlines onto the Red Jewel Lines (Hồng Tâm Cát Hào)—most notably Yao 2 and Yao 5—while maintaining at least 0.75° clearance from inter-hexagram Void Lines (Không Vong).

1. Cosmological Identity, Early/Later Heaven Numerology & Classical Canon of the Kun Group (Earth ☷ · Khôn Cung)

Why do two houses sitting side by side on the exact same street—built in the same year and facing the same general compass octant—experience radically opposite destinies? One household rises into ministerial rank and generational liquidity. Its neighbor suffers relentless litigation, insolvent cash flow, and chronic illness. Standard 15°-mountain compasses cannot explain this divergence. Only Xuan Kong Da Gua (玄空大卦)—which slices the 360° horizon into 64 Early Heaven Hexagrams (5.625° per hexagram) and 384 individual yao lines (0.9375° per line)—exposes the sub-degree truth.

At the heart of this 64-hexagram cosmos stands the Kun Group (Earth ☷ · Khôn Cung) (坤宮八卦). To master its eight constituent hexagrams on a San Yuan Luo Pan, a practitioner must first internalize the three distinct numerical identities that Trigram Kun (坤 ☷) carries across the Theoretical Foundations of Chinese metaphysics:

1. Fu Xi Early Heaven Bagua Identity (Tiên Thiên Bát Quái — Primordial Cosmic Form): In Fu Xi's Early Heaven sequence, Kun ☷ holds Early Heaven Number 8 and resides at Due North (Early Heaven Axis Base), embodying Receptive Earth (Dì 地) and the archetypal family role of Mother / Matriarch (Lão Mẫu 老母).
2. King Wen Later Heaven Bagua Identity (Hậu Thiên Bát Quái — Mundane Spatial Sector): When the trigrams descend into terrestrial manifestation under King Wen's Later Heaven arrangement, Kun ☷ moves to Southwest (Mùi – Khôn – Thân · 202.5°–247.5°) and governs Later Heaven Luo Shu Number 2, radiating the trigram Five Phase of Nurturing Yin Earth (Âm Thổ 陰土).
3. San Yuan Xuan Kong Da Gua Outer Qi Identity ( Tiên Hậu Thiên Hợp Lạc Quái Khí): When Fu Xi's Early Heaven Bagua is superimposed directly onto the Nine Palaces of the Luo Shu Magic Square (“Nine at the head, One at the foot; Three on the left, Seven on the right; Two and Four at the shoulders; Six and Eight at the feet”), the Early Heaven position of Kun ☷ lands on Luo Shu Number 1! Converted through the He Tu Creation Formula (1–6 Water, 2–7 Fire, 3–8 Wood, 4–9 Metal), every hexagram with Kun ☷ as its Upper (Outer) Trigram carries Gua Qi 1 — Yang Water (He Tu 1–6 Co-Ancestor Water).

「地天泰卦下元九，卦氣一水合十有；坤山坤向水流坤，富貴綿遠萬年春。」 Dì Tiān Tài guà xià yuán jiǔ, guà qì yī shuǐ hé shí yǒu; Kūn shān Kūn xiàng shuǐ liú Kūn, fù guì mián yuǎn wàn nián chūn.
Earth Heaven Tai governs Lower Cycle Period Nine, holding Gua Qi One Water in internal Sum-of-Ten completion; when a Kun Mountain faces Kun and water flows through Kun, wealth and nobility endure through ten thousand springs.
— Grandmaster Yang Yun Song & Jiang Da Hong Lineage («Tian Yu Jing & Di Li Bian Zheng»)

Read that classical verse again. Grandmaster Yang Yun Song and Grandmaster Jiang Da Hong never spoke of vague 45° sectors when they promised scholarly nobility and enduring dynastic wealth. They spoke of locking the Incoming Dragon, Sitting Mountain, Facing Direction, and Water Mouth into the pure hexagram veins of the Kun Group (Earth ☷ · Khôn Cung) and its resonant partners! Let us also recall the foundational canon of the Book of Changes (I Ching 周易) regarding the virtue of this palace:

「至哉坤元，萬物資生，乃順承天。坤厚載物，德合無疆。」 Zhì zāi Kūn yuán, wàn wù zī shēng, nǎi shùn chéng tiān. Kūn hòu zài wù, dé hé wú jiāng.
Supreme indeed is the originating power of Kun! All myriad things owe their birth and nourishment to it, as it receptively carries out the will of Heaven. Kun in its thickness supports all beings, its virtue matching the boundless.
— «Book of Changes · Commentary on the Judgments of Kun» (周易·坤卦·彖傳)

Numbers govern form. Form channels Qi. When you step onto a site with your Luo Pan, understanding how Early Heaven 8, Later Heaven 2, and Da Gua Outer Qi 1 interlock within the Kun Group (Earth ☷ · Khôn Cung) separates authentic lineage mastery from textbook guesswork.

2. Dual Classification Mechanics: Jing Fang 8-Palace Lineage vs. San Yuan Upper-Trigram Gua Qi 1 Ring

Stop right here. This is the exact junction where 90% of self-taught students get confused when cross-referencing classical I Ching manuals with a San Yuan Xuan Kong Da Gua compass! Why do some texts list the 8 hexagrams of the Kun Group (Earth ☷ · Khôn Cung) as #2 Khôn Vi Địa (䷁), #24 Địa Lôi Phục (䷗), #19 Địa Trạch Lâm (䷒), #11 Địa Thiên Thái (䷊), #34 Lôi Thiên Đại Tráng (䷡), #43 Trạch Thiên Quải (䷪), #5 Thủy Thiên Nhu (䷄), #8 Thủy Địa Tỷ (䷇), whereas the outer Gua Qi table of a San Yuan Luo Pan lists the 8 hexagrams of Gua Qi 1 (Kun ☷) as #2 Khôn Vi Địa (䷁), #24 Địa Lôi Phục (䷗), #19 Địa Trạch Lâm (䷒), #11 Địa Thiên Thái (䷊), #36 Địa Hỏa Minh Di (䷣), #46 Địa Phong Thăng (䷭), #7 Địa Thủy Sư (䷆), #15 Địa Sơn Khiêm (䷎)? Both lists are 100% authentic. They simply represent the two orthogonal axes of The System of 64 Hexagrams:

AXIS 1 · ANCESTRAL SOUL

Jing Fang's Eight-Palace Transformation (Bát Cung Kinh Phòng 京房八宮)

Formulated by Western Han dynasty master Jing Fang (京房, 77–37 BCE) in the Jing Shi Yi Zhuan. Starting from the doubled pure hexagram #2 Khôn Vi Địa (䷁), lines transform sequentially from bottom to top: 1st Yao (1st Gen), 2nd Yao (2nd Gen), 3rd Yao (3rd Gen), 4th Yao (4th Gen), 5th Yao (5th Gen), back to 4th Yao (Wandering Soul / Du Hồn), and finally restoring the lower 3 lines to the root trigram (Returning Soul / Quy Hồn). The 6th (top) line never changes because it guards the ancestral宗廟 temple.

AXIS 2 · COMPASS GUA QI

San Yuan Upper-Trigram Gua Qi Ring (Ngoại Quái Quái Khí 卦氣環)

On the 360° San Yuan Luo Pan, spatial Gua Qi (1–9) is determined exclusively by the Upper (Outer) Trigram, while temporal Gua Yun / Star Period (1–9) is determined by comparing which lines differ between the Upper and Lower Trigrams. Therefore, all 8 hexagrams that share Kun ☷ as their Upper Trigram share Gua Qi 1 (Yang Water (He Tu 1–6 Co-Ancestor Water)) and span all 8 Star Periods (1, 2, 3, 4, 6, 7, 8, 9).

Look at the mathematical bridge between Axis 1 and Axis 2. In Jing Fang's 8-step transformation of the Kun Group (Earth ☷ · Khôn Cung):

Steps 0, 1, 2, and 3 (Pure Root #2, 1st Gen #24, 2nd Gen #19, and 3rd Gen #11): Because only the Lower (Inner) Trigram lines change during the first three generations, their Upper (Outer) Trigram remains Kun ☷! Consequently, these first four hexagrams carry Gua Qi 1 and belong to both the Jing Fang Kun Palace and the Upper-Kun Compass Ring! Specifically, Step 0 (#2 Khôn Vi Địa) is the Period 1 Upper-Cycle Parent, Step 1 (#24 Địa Lôi Phục) is the Period 2 Jiangdong Hexagram, Step 2 (#19 Địa Trạch Lâm) is the Period 6 North-South Opposite Hexagram, and Step 3 (#11 Địa Thiên Thái) is the Period 9 Lower-Cycle Parent!
Steps 4, 5, 6, and 7 (4th Gen #34, 5th Gen #43, Wandering Soul #5, and Returning Soul #8): Once the Jing Fang transformation climbs into the 4th and 5th lines, the Upper Trigram changes from Kun ☷ into four other trigrams! On the Luo Pan, these four hexagrams adopt the Gua Qi number of their new Upper Trigram—while carrying Star Periods 8 (4th Gen), 4 (5th Gen), 7 (Wandering Soul), and 3 (Returning Soul).
The 4 Cross-Palace Complements (#36, #46, #7, and #15): Conversely, four hexagrams born as the 4th Gen, 5th Gen, Wandering Soul, and Returning Soul of other Jing Fang palaces acquire Kun ☷ as their Upper Trigram—supplying Star Periods 4, 3, 8, and 7 inside the Gua Qi 1 compass family!

Figure 1: The 8 Jing Fang Palace Hexagrams (Bát Cung Kinh Phòng) of the Kun Group (Earth ☷ · Khôn Cung) showing line-transformation steps, Gua Qi numbers, Star Periods, and 24-Mountain arcs.

By mastering both sets—all 8 Jing Fang Palace hexagrams and their 4 Upper-Kun Compass Ring complements (12 hexagrams in total, with 4 shared at the core)—you command the entire theoretical and practical spectrum of the Kun Group (Earth ☷ · Khôn Cung).

3. Master Reference Matrix: Complete 8 Jing Fang Palace Hexagrams & 8 Upper-Kun Compass Hexagrams

Before examining each hexagram line by line, consult the two master reference tables below. Table 1 synthesizes the 8 Jing Fang Palace Hexagrams of the Kun Group (Earth ☷ · Khôn Cung), while Table 2 synthesizes the 8 San Yuan Upper-Kun Compass Ring Hexagrams that share Gua Qi 1 (Yang Water (He Tu 1–6 Co-Ancestor Water)).

Table 1: The 8 Jing Fang Palace Hexagrams (Bát Cung Kinh Phòng) of the Kun Group (Earth ☷ · Khôn Cung)
King Wen # & Hexagram	Jing Fang Step	Upper / Lower	Da Gua Qi & Element	Gua Yun (Star Period)	360° Compass Arc & Red Yao	Period 9 (2024–2043) Role
#02 Khôn Vi Địa Kun (The Receptive Earth) · 坤為地 ䷁	0. Pure Root (Bát Thuần)	Kun ☷ / Kun ☷	Gua Qi 1 Yang Water (1-6 Water)	Period 1 Greedy Wolf (Tan Lang)	Nhâm – Tý (348.750°–354.375°) Red: Yao 2 (349.688°–350.625°), Yao 5 (352.500°–353.438°)	★ DOUBLE-ONE CROWN INDIRECT SPIRIT (Gua Qi 1 + Star Period 1 → Double 1+9=10 with Period 9!)
#24 Địa Lôi Phục Fu (Return / The Turning Point) · 地雷復 ䷗	1. 1st Gen (Nhất Thế)	Kun ☷ / Zhen ☳	Gua Qi 1 Yang Water (1-6 Water)	Period 2 Giant Gate (Ju Men)	Tý (354.375°–360.000°) Red: Yao 1 (354.375°–355.313°), Yao 2 (355.313°–356.250°), Yao 5 (358.125°–359.063°)	Upper Cycle Indirect Spirit · Gua Qi 1 Sum-of-Ten with Qian 9 (1+9=10)
#19 Địa Trạch Lâm Lin (Approach / Overseeing) · 地澤臨 ䷒	2. 2nd Gen (Nhị Thế)	Kun ☷ / Dui ☱	Gua Qi 1 Yang Water (1-6 Water)	Period 6 Military Arts (Wu Qu)	Nhâm (343.125°–348.750°) Red: Yao 1 (343.125°–344.063°), Yao 2 (344.063°–345.000°), Yao 5 (346.875°–347.813°), Yao 6 (347.813°–348.750°)	Lower Cycle Direct Spirit Group (Internal He Tu 1-6 Co-Ancestor Water!)
#11 Địa Thiên Thái Tai (Peace / Pervading Harmony) · 地天泰 ䷊	3. 3rd Gen (Tam Thế)	Kun ☷ / Qian ☰	Gua Qi 1 Yang Water (1-6 Water)	Period 9 Right Assistant (You Bi)	Hợi – Nhâm (337.500°–343.125°) Red: Yao 1 (337.500°–338.438°), Yao 2 (338.438°–339.375°), Yao 5 (341.250°–342.188°)	★ SUPREME INTERNAL SUM-OF-TEN & TIMELY PERIOD 9 PARENT (Gua Qi 1 + Period 9 = 10!)
#34 Lôi Thiên Đại Tráng Da Zhuang (The Power of the Great) · 雷天大壯 ䷡	4. 4th Gen (Tứ Thế)	Zhen ☳ / Qian ☰	Gua Qi 8 Yin Wood (3-8 Wood)	Period 8 Left Assistant (Zuo Fu)	Tỵ – Bính (157.500°–163.125°) Red: Yao 2 (158.438°–159.375°), Yao 4 (160.313°–161.250°)	★ Double-8 Powerhouse (Gua Qi 8 Wood + Star Period 8 Direct Spirit Group)
#43 Trạch Thiên Quải Guai (Breakthrough / Resoluteness) · 澤天夬 ䷪	5. 5th Gen (Ngũ Thế)	Dui ☱ / Qian ☰	Gua Qi 4 Yin Metal (4-9 Metal)	Period 4 Literary Arts (Wen Qu)	Tuất (294.375°–300.000°) Red: Yao 2 (295.313°–296.250°), Yao 5 (298.125°–299.063°)	Upper-Dui Gua Qi 4 Metal · Double-4 Literary Indirect Spirit
#05 Thủy Thiên Nhu Xu (Waiting / Nourishment) · 水天需 ䷄	6. Wandering Soul (Du Hồn)	Kan ☵ / Qian ☰	Gua Qi 7 Yang Fire (2-7 Fire)	Period 7 Broken Army (Po Jun)	Giáp – Mão (78.750°–84.375°) Red: Yao 1 (78.750°–79.688°), Yao 2 (79.688°–80.625°), Yao 5 (82.500°–83.438°)	★ Double-7 Banquet Hexagram (Gua Qi 7 Fire + Star Period 7 · Wandering Soul of Kun)
#08 Thủy Địa Tỷ Bi (Holding Together / Union) · 水地比 ䷇	7. Returning Soul (Quy Hồn)	Kan ☵ / Kun ☷	Gua Qi 7 Yang Fire (2-7 Fire)	Period 3 Rank / Lu Cun	Cấn (45.000°–50.625°) Red: Yao 1 (45.000°–45.938°), Yao 2 (45.938°–46.875°), Yao 4 (47.813°–48.750°), Yao 5 (48.750°–49.688°)	★ Internal Sum-of-Ten Noble Union (Gua Qi 7 + Period 3 = 10 · Returning Soul of Kun)

Table 2: The 8 San Yuan Compass Ring Hexagrams Sharing Upper Trigram Kun ☷ (All Carrying Gua Qi 1 — Yang Water (He Tu 1–6 Co-Ancestor Water))
King Wen # & Hexagram	Upper / Lower	Outer Gua Qi	Star Period (Gua Yun)	Jing Fang Overlap	360° Fu Xi Compass Arc	Sum-of-Ten (He Shi) Targets
#02 Khôn Vi Địa (坤為地 ䷁)	Kun ☷ / Kun ☷	Gua Qi 1 (Yang Water)	Period 1 (Greedy Wolf (Tan Lang))	Yes (Steps 0–3)	Nhâm – Tý (348.750°–354.375°)	Gua Qi 9 (He Shi) · Period 9 (He Shi)
#24 Địa Lôi Phục (地雷復 ䷗)	Kun ☷ / Zhen ☳	Gua Qi 1 (Yang Water)	Period 2 (Giant Gate (Ju Men))	Yes (Steps 0–3)	Tý (354.375°–360.000°)	Gua Qi 9 (He Shi) · Period 8 (He Shi)
#19 Địa Trạch Lâm (地澤臨 ䷒)	Kun ☷ / Dui ☱	Gua Qi 1 (Yang Water)	Period 6 (Military Arts (Wu Qu))	Yes (Steps 0–3)	Nhâm (343.125°–348.750°)	Gua Qi 9 (He Shi) · Period 4 (He Shi)
#11 Địa Thiên Thái (地天泰 ䷊)	Kun ☷ / Qian ☰	Gua Qi 1 (Yang Water)	Period 9 (Right Assistant (You Bi))	Yes (Steps 0–3)	Hợi – Nhâm (337.500°–343.125°)	Gua Qi 9 (He Shi) · Period 1 (He Shi)
#36 Địa Hỏa Minh Di (地火明夷 ䷣)	Kun ☷ / Li ☲	Gua Qi 1 (Yang Water)	Period 7 (Broken Army (Po Jun))	Cross-Palace (Steps 4–7)	Nhâm – Tý (348.750°–354.375°)	Gua Qi 9 (He Shi) · Period 3 (He Shi)
#46 Địa Phong Thăng (地風升 ䷭)	Kun ☷ / Xun ☴	Gua Qi 1 (Yang Water)	Period 8 (Left Assistant (Zuo Fu))	Cross-Palace (Steps 4–7)	Hợi (331.875°–337.500°)	Gua Qi 9 (He Shi) · Period 2 (He Shi)
#07 Địa Thủy Sư (地水師 ䷆)	Kun ☷ / Kan ☵	Gua Qi 1 (Yang Water)	Period 3 (Rank / Lu Cun)	Cross-Palace (Steps 4–7)	Càn – Hợi (322.500°–326.250°)	Gua Qi 9 (He Shi) · Period 7 (He Shi)
#15 Địa Sơn Khiêm (地山謙 ䷎)	Kun ☷ / Gen ☶	Gua Qi 1 (Yang Water)	Period 4 (Literary Arts (Wen Qu))	Cross-Palace (Steps 4–7)	Hợi (326.250°–331.875°)	Gua Qi 9 (He Shi) · Period 6 (He Shi)

Figure 2: Comparison of the 8 Upper-Kun Compass Ring Hexagrams (all carrying Gua Qi 1) and their overlap with the Jing Fang Kun Palace.

Notice the mathematical elegance in Table 2: within the 8 hexagrams sharing Upper Trigram Kun ☷, every single Star Period from 1 to 9 (excluding the central 5) appears exactly once (1, 2, 3, 4, 6, 7, 8, 9). Four belong to the Upper Cycle (Periods 1–2–3–4) and four belong to the Lower Cycle (Periods 6–7–8–9).

4. Deep-Dive Monograph Pt. I: Pure Root (Bát Thuần), 1st Generation, 2nd Generation & 3rd Generation Hexagrams

Let us now dissect the first four hexagrams of the Kun Group (Earth ☷ · Khôn Cung): #2 Khôn Vi Địa (䷁), #24 Địa Lôi Phục (䷗), #19 Địa Trạch Lâm (䷒), and #11 Địa Thiên Thái (䷊). Because all four retain Kun ☷ as their Upper (Outer) Trigram, all four carry Gua Qi 1 (Yang Water (He Tu 1–6 Co-Ancestor Water)) and progress from Pure Root (Period 1) through 1st Gen (Period 2) and 2nd Gen (Period 6) to culmination at the 3rd-Generation Parent Hexagram (Period 9)!

King Wen #02 · Kūn Wéi Dì · Jing Fang Step 0

#02. Khôn Vi Địa — Kun (The Receptive Earth) (坤為地 ䷁) · Gua Qi 1 & Period 1

1. Structural & Trigram Anatomy: Upper (Outer) Trigram Kun ☷ over Lower (Inner) Trigram Kun ☷. Jing Fang Step 0: Pure Palace Root (Bát Thuần Quái · 八純卦). Because its Upper (Outer) Trigram is Kun ☷ and its Jing Fang transformation remains within the lower three lines, #2 Khôn Vi Địa (坤為地 ䷁) belongs simultaneously to the Jing Fang Kun Palace and the San Yuan Upper-Kun Gua Qi 1 Compass Ring. Measure the angle twice. Never guess.

2. Two-Ring Numerical Code (Gua Qi & Gua Yun): On the outer San Yuan Gua Qi ring, #2 Khôn Vi Địa carries Gua Qi 1 (Yang Water (1-6 Water)), which achieves Sum-of-Ten (He Shi 合十) resonance with Gua Qi 9 (1 + 9 = 10) and He Tu Generative Difference-of-Five (He Sheng Cheng 合生成) with Gua Qi 6 (|1 − 6| = 5). On the inner Star Period ring, it carries Period 1 · Greedy Wolf (Tan Lang) (Upper Cycle Parent (Periods 1–4)), forming temporal Sum-of-Ten with Star Period 9 (1 + 9 = 10).

3. 360° Fu Xi Compass Arc & 384-Yao Line Division: Occupies the 5.625° horizon sector at Nhâm – Tý (348.750°–354.375°) within the Tý (Due N) mountain sector. Its prime Auspicious Red Jewel Lines (Hồng Tâm Cát Hào) are Yao 2 (349.688°–350.625°), Yao 5 (352.500°–353.438°) (each spanning exactly 0.9375°). Practitioners must strictly avoid the Void Taboo Zones (Không Vong Tuyến) at 348.750° ±0.45°, 354.375° ±0.45°, where qi scatters into erratic turbulence.

4. Period 9 (2024–2043) Field Application (Sitting, Facing, Gate, Stove & Water): ★ DOUBLE-ONE CROWN INDIRECT SPIRIT (Gua Qi 1 + Star Period 1 → Double 1+9=10 with Period 9!). Carries Gua Qi 1 and Star Period 1 simultaneously! Pairs with Double-9 Pi (#12, Gua Qi 9, Period 9) for a pure Double Sum-of-Ten (1+9=10 in both rings) across the property. When activating #2 Khôn Vi Địa via Xuan Kong Da Gua Date Selection, select Year, Month, Day, and Hour pillars carrying Gua Qi 1 (Pure One Qi), Gua Qi 9 (Sum of Ten), or Gua Qi 6 (He Tu Same-Element Completion).

King Wen #24 · Dì Léi Fù · Jing Fang Step 1

#24. Địa Lôi Phục — Fu (Return / The Turning Point) (地雷復 ䷗) · Gua Qi 1 & Period 2

1. Structural & Trigram Anatomy: Upper (Outer) Trigram Kun ☷ over Lower (Inner) Trigram Zhen ☳. Jing Fang Step 1: 1st Generation (Nhất Thế Quái · 一世卦). Because its Upper (Outer) Trigram is Kun ☷ and its Jing Fang transformation remains within the lower three lines, #24 Địa Lôi Phục (地雷復 ䷗) belongs simultaneously to the Jing Fang Kun Palace and the San Yuan Upper-Kun Gua Qi 1 Compass Ring. Measure the angle twice. Never guess.

2. Two-Ring Numerical Code (Gua Qi & Gua Yun): On the outer San Yuan Gua Qi ring, #24 Địa Lôi Phục carries Gua Qi 1 (Yang Water (1-6 Water)), which achieves Sum-of-Ten (He Shi 合十) resonance with Gua Qi 9 (1 + 9 = 10) and He Tu Generative Difference-of-Five (He Sheng Cheng 合生成) with Gua Qi 6 (|1 − 6| = 5). On the inner Star Period ring, it carries Period 2 · Giant Gate (Ju Men) (Upper Cycle Jiangdong (1st Yao Change · 1st Gen of Kun)), forming temporal Sum-of-Ten with Star Period 8 (2 + 8 = 10).

3. 360° Fu Xi Compass Arc & 384-Yao Line Division: Occupies the 5.625° horizon sector at Tý (354.375°–360.000°) within the Tý (Due N) mountain sector. Its prime Auspicious Red Jewel Lines (Hồng Tâm Cát Hào) are Yao 1 (354.375°–355.313°), Yao 2 (355.313°–356.250°), Yao 5 (358.125°–359.063°) (each spanning exactly 0.9375°). Practitioners must strictly avoid the Void Taboo Zones (Không Vong Tuyến) at 354.375° ±0.45°, 360.000° ±0.75° (Due North Cardinal Yang-Rebirth Seam), where qi scatters into erratic turbulence.

4. Period 9 (2024–2043) Field Application (Sitting, Facing, Gate, Stove & Water): Upper Cycle Indirect Spirit · Gua Qi 1 Sum-of-Ten with Qian 9 (1+9=10). One Yang line reborn at Winter Solstice (Yao 1 'Return from a short distance, supreme auspiciousness'). Revitalizes stagnant properties when tapped as a northern Water Mouth. When activating #24 Địa Lôi Phục via Xuan Kong Da Gua Date Selection, select Year, Month, Day, and Hour pillars carrying Gua Qi 1 (Pure One Qi), Gua Qi 9 (Sum of Ten), or Gua Qi 6 (He Tu Same-Element Completion).

King Wen #19 · Dì Zé Lín · Jing Fang Step 2

#19. Địa Trạch Lâm — Lin (Approach / Overseeing) (地澤臨 ䷒) · Gua Qi 1 & Period 6

1. Structural & Trigram Anatomy: Upper (Outer) Trigram Kun ☷ over Lower (Inner) Trigram Dui ☱. Jing Fang Step 2: 2nd Generation (Nhị Thế Quái · 二世卦). Because its Upper (Outer) Trigram is Kun ☷ and its Jing Fang transformation remains within the lower three lines, #19 Địa Trạch Lâm (地澤臨 ䷒) belongs simultaneously to the Jing Fang Kun Palace and the San Yuan Upper-Kun Gua Qi 1 Compass Ring. Measure the angle twice. Never guess.

2. Two-Ring Numerical Code (Gua Qi & Gua Yun): On the outer San Yuan Gua Qi ring, #19 Địa Trạch Lâm carries Gua Qi 1 (Yang Water (1-6 Water)), which achieves Sum-of-Ten (He Shi 合十) resonance with Gua Qi 9 (1 + 9 = 10) and He Tu Generative Difference-of-Five (He Sheng Cheng 合生成) with Gua Qi 6 (|1 − 6| = 5). On the inner Star Period ring, it carries Period 6 · Military Arts (Wu Qu) (Lower Cycle North-South Opposite (2nd Gen of Kun)), forming temporal Sum-of-Ten with Star Period 4 (6 + 4 = 10).

3. 360° Fu Xi Compass Arc & 384-Yao Line Division: Occupies the 5.625° horizon sector at Nhâm (343.125°–348.750°) within the Nhâm (NNW) mountain sector. Its prime Auspicious Red Jewel Lines (Hồng Tâm Cát Hào) are Yao 1 (343.125°–344.063°), Yao 2 (344.063°–345.000°), Yao 5 (346.875°–347.813°), Yao 6 (347.813°–348.750°) (each spanning exactly 0.9375°). Practitioners must strictly avoid the Void Taboo Zones (Không Vong Tuyến) at 343.125° ±0.45°, 348.750° ±0.45°, where qi scatters into erratic turbulence.

4. Period 9 (2024–2043) Field Application (Sitting, Facing, Gate, Stove & Water): Lower Cycle Direct Spirit Group (Internal He Tu 1-6 Co-Ancestor Water!). Built-in He Tu Generative Hexagram (Gua Qi 1 + Period 6 = 1-6 Co-Ancestor Water)! Two growing Yang lines at the bottom nourish real estate holdings, executive governance, and sitting stability. When activating #19 Địa Trạch Lâm via Xuan Kong Da Gua Date Selection, select Year, Month, Day, and Hour pillars carrying Gua Qi 1 (Pure One Qi), Gua Qi 9 (Sum of Ten), or Gua Qi 6 (He Tu Same-Element Completion).

King Wen #11 · Dì Tiān Tài · Jing Fang Step 3

#11. Địa Thiên Thái — Tai (Peace / Pervading Harmony) (地天泰 ䷊) · Gua Qi 1 & Period 9

1. Structural & Trigram Anatomy: Upper (Outer) Trigram Kun ☷ over Lower (Inner) Trigram Qian ☰. Jing Fang Step 3: 3rd Generation (Tam Thế Quái · 三世卦). Because its Upper (Outer) Trigram is Kun ☷ and its Jing Fang transformation remains within the lower three lines, #11 Địa Thiên Thái (地天泰 ䷊) belongs simultaneously to the Jing Fang Kun Palace and the San Yuan Upper-Kun Gua Qi 1 Compass Ring. Measure the angle twice. Never guess.

2. Two-Ring Numerical Code (Gua Qi & Gua Yun): On the outer San Yuan Gua Qi ring, #11 Địa Thiên Thái carries Gua Qi 1 (Yang Water (1-6 Water)), which achieves Sum-of-Ten (He Shi 合十) resonance with Gua Qi 9 (1 + 9 = 10) and He Tu Generative Difference-of-Five (He Sheng Cheng 合生成) with Gua Qi 6 (|1 − 6| = 5). On the inner Star Period ring, it carries Period 9 · Right Assistant (You Bi) (Lower Cycle Parent (All 3 Yao Opposite · 3rd Gen of Kun)), forming temporal Sum-of-Ten with Star Period 1 (9 + 1 = 10).

3. 360° Fu Xi Compass Arc & 384-Yao Line Division: Occupies the 5.625° horizon sector at Hợi – Nhâm (337.500°–343.125°) within the Nhâm (NNW) mountain sector. Its prime Auspicious Red Jewel Lines (Hồng Tâm Cát Hào) are Yao 1 (337.500°–338.438°), Yao 2 (338.438°–339.375°), Yao 5 (341.250°–342.188°) (each spanning exactly 0.9375°). Practitioners must strictly avoid the Void Taboo Zones (Không Vong Tuyến) at 337.500° ±0.75° (Hợi–Nhâm Palace Border), 343.125° ±0.45°, where qi scatters into erratic turbulence.

4. Period 9 (2024–2043) Field Application (Sitting, Facing, Gate, Stove & Water): ★ SUPREME INTERNAL SUM-OF-TEN & TIMELY PERIOD 9 PARENT (Gua Qi 1 + Period 9 = 10!). Heaven's Yang Qi ascends from below while Earth's Yin Qi descends from above in total communion! Carries Gua Qi 1 + Star Period 9 (internal 1+9=10 Sum-of-Ten)—one of the greatest hexagrams on the entire compass. When activating #11 Địa Thiên Thái via Xuan Kong Da Gua Date Selection, select Year, Month, Day, and Hour pillars carrying Gua Qi 1 (Pure One Qi), Gua Qi 9 (Sum of Ten), or Gua Qi 6 (He Tu Same-Element Completion).

5. Deep-Dive Monograph Pt. II: 4th Generation, 5th Generation, Wandering Soul (Du Hồn) & Returning Soul (Quy Hồn)

Once the 3rd Generation (#11 Địa Thiên Thái) completes the transformation of the Lower Trigram, Jing Fang's line progression ascends into the Upper (Outer) Trigram across the 4th Generation (#34 Lôi Thiên Đại Tráng), 5th Generation (#43 Trạch Thiên Quải), Wandering Soul (#5 Thủy Thiên Nhu), and Returning Soul (#8 Thủy Địa Tỷ). Watch how the Outer Trigram shifts across the palaces while the inner ancestral pulse of the Kun Group (Earth ☷ · Khôn Cung) drives their destiny:

King Wen #34 · Léi Tiān Dà Zhuàng · Jing Fang Step 4

#34. Lôi Thiên Đại Tráng — Da Zhuang (The Power of the Great) (雷天大壯 ䷡) · Gua Qi 8 & Period 8

1. Structural & Trigram Anatomy: Upper (Outer) Trigram Zhen ☳ over Lower (Inner) Trigram Qian ☰. Jing Fang Step 4: 4th Generation (Tứ Thế Quái · 四世卦). In the Jing Fang 8-Palace sequence, the transformation has ascended into the Upper Trigram (shifting the Outer Trigram to Zhen ☳), so on the San Yuan Luo Pan its spatial Gua Qi becomes Gua Qi 8 (Yin Wood (3-8 Wood)) while its ancestral soul remains rooted in the Kun Palace. Measure the angle twice. Never guess.

2. Two-Ring Numerical Code (Gua Qi & Gua Yun): On the outer San Yuan Gua Qi ring, #34 Lôi Thiên Đại Tráng carries Gua Qi 8 (Yin Wood (3-8 Wood)), which achieves Sum-of-Ten (He Shi 合十) resonance with Gua Qi 2 (8 + 2 = 10) and He Tu Generative Difference-of-Five (He Sheng Cheng 合生成) with Gua Qi 3 (|8 − 3| = 5). On the inner Star Period ring, it carries Period 8 · Left Assistant (Zuo Fu) (Lower Cycle Jiangdong Opposite (4th Gen of Kun · Upper-Zhen Ring)), forming temporal Sum-of-Ten with Star Period 2 (8 + 2 = 10).

3. 360° Fu Xi Compass Arc & 384-Yao Line Division: Occupies the 5.625° horizon sector at Tỵ – Bính (157.500°–163.125°) within the Bính (SSE) mountain sector. Its prime Auspicious Red Jewel Lines (Hồng Tâm Cát Hào) are Yao 2 (158.438°–159.375°), Yao 4 (160.313°–161.250°) (each spanning exactly 0.9375°). Practitioners must strictly avoid the Void Taboo Zones (Không Vong Tuyến) at 157.500° ±0.75° (Tỵ–Bính Palace Border), 163.125° ±0.45°, where qi scatters into erratic turbulence.

4. Period 9 (2024–2043) Field Application (Sitting, Facing, Gate, Stove & Water): ★ Double-8 Powerhouse (Gua Qi 8 Wood + Star Period 8 Direct Spirit Group). Four Yang lines surging beneath Thunder in the sky! Forms Double Sum-of-Ten (8+2=10 in both Gua Qi and Period) with Xun #9 Xiao Chu (Gua Qi 2, Period 2). When activating #34 Lôi Thiên Đại Tráng via Xuan Kong Da Gua Date Selection, select Year, Month, Day, and Hour pillars carrying Gua Qi 8 (Pure One Qi), Gua Qi 2 (Sum of Ten), or Gua Qi 3 (He Tu Same-Element Completion).

King Wen #43 · Zé Tiān Guài · Jing Fang Step 5

#43. Trạch Thiên Quải — Guai (Breakthrough / Resoluteness) (澤天夬 ䷪) · Gua Qi 4 & Period 4

1. Structural & Trigram Anatomy: Upper (Outer) Trigram Dui ☱ over Lower (Inner) Trigram Qian ☰. Jing Fang Step 5: 5th Generation (Ngũ Thế Quái · 五世卦). In the Jing Fang 8-Palace sequence, the transformation has ascended into the Upper Trigram (shifting the Outer Trigram to Dui ☱), so on the San Yuan Luo Pan its spatial Gua Qi becomes Gua Qi 4 (Yin Metal (4-9 Metal)) while its ancestral soul remains rooted in the Kun Palace. Measure the angle twice. Never guess.

2. Two-Ring Numerical Code (Gua Qi & Gua Yun): On the outer San Yuan Gua Qi ring, #43 Trạch Thiên Quải carries Gua Qi 4 (Yin Metal (4-9 Metal)), which achieves Sum-of-Ten (He Shi 合十) resonance with Gua Qi 6 (4 + 6 = 10) and He Tu Generative Difference-of-Five (He Sheng Cheng 合生成) with Gua Qi 9 (|4 − 9| = 5). On the inner Star Period ring, it carries Period 4 · Literary Arts (Wen Qu) (Upper Cycle North-South (3rd Yao Change · 5th Gen of Kun)), forming temporal Sum-of-Ten with Star Period 6 (4 + 6 = 10).

3. 360° Fu Xi Compass Arc & 384-Yao Line Division: Occupies the 5.625° horizon sector at Tuất (294.375°–300.000°) within the Tuất (WNW) mountain sector. Its prime Auspicious Red Jewel Lines (Hồng Tâm Cát Hào) are Yao 2 (295.313°–296.250°), Yao 5 (298.125°–299.063°) (each spanning exactly 0.9375°). Practitioners must strictly avoid the Void Taboo Zones (Không Vong Tuyến) at 294.375° ±0.45°, 300.000° ±0.75° (Tuất–Càn Palace Boundary), where qi scatters into erratic turbulence.

4. Period 9 (2024–2043) Field Application (Sitting, Facing, Gate, Stove & Water): Upper-Dui Gua Qi 4 Metal · Double-4 Literary Indirect Spirit. Upper-Dui compass hexagram (Gua Qi 4 + Period 4) and 5th Generation of Kun Palace. Forms Double Sum-of-Ten (4+6=10 in both Gua Qi and Period) with Gen #26 Da Chu (Gua Qi 6, Period 6)! When activating #43 Trạch Thiên Quải via Xuan Kong Da Gua Date Selection, select Year, Month, Day, and Hour pillars carrying Gua Qi 4 (Pure One Qi), Gua Qi 6 (Sum of Ten), or Gua Qi 9 (He Tu Same-Element Completion).

King Wen #05 · Shuǐ Tiān Xū · Jing Fang Step 6

#05. Thủy Thiên Nhu — Xu (Waiting / Nourishment) (水天需 ䷄) · Gua Qi 7 & Period 7

1. Structural & Trigram Anatomy: Upper (Outer) Trigram Kan ☵ over Lower (Inner) Trigram Qian ☰. Jing Fang Step 6: Wandering Soul (Du Hồn Quái · 遊魂卦). In the Jing Fang 8-Palace sequence, the transformation has ascended into the Upper Trigram (shifting the Outer Trigram to Kan ☵), so on the San Yuan Luo Pan its spatial Gua Qi becomes Gua Qi 7 (Yang Fire (2-7 Fire)) while its ancestral soul remains rooted in the Kun Palace. Measure the angle twice. Never guess.

2. Two-Ring Numerical Code (Gua Qi & Gua Yun): On the outer San Yuan Gua Qi ring, #5 Thủy Thiên Nhu carries Gua Qi 7 (Yang Fire (2-7 Fire)), which achieves Sum-of-Ten (He Shi 合十) resonance with Gua Qi 3 (7 + 3 = 10) and He Tu Generative Difference-of-Five (He Sheng Cheng 合生成) with Gua Qi 2 (|7 − 2| = 5). On the inner Star Period ring, it carries Period 7 · Broken Army (Po Jun) (Lower Cycle Jiangxi Opposite (Wandering Soul of Kun · Upper-Kan Ring)), forming temporal Sum-of-Ten with Star Period 3 (7 + 3 = 10).

3. 360° Fu Xi Compass Arc & 384-Yao Line Division: Occupies the 5.625° horizon sector at Giáp – Mão (78.750°–84.375°) within the Giáp / Mão (E) mountain sector. Its prime Auspicious Red Jewel Lines (Hồng Tâm Cát Hào) are Yao 1 (78.750°–79.688°), Yao 2 (79.688°–80.625°), Yao 5 (82.500°–83.438°) (each spanning exactly 0.9375°). Practitioners must strictly avoid the Void Taboo Zones (Không Vong Tuyến) at 78.750° ±0.45°, 84.375° ±0.45°, where qi scatters into erratic turbulence.

4. Period 9 (2024–2043) Field Application (Sitting, Facing, Gate, Stove & Water): ★ Double-7 Banquet Hexagram (Gua Qi 7 Fire + Star Period 7 · Wandering Soul of Kun). Rain clouds rising in the heavens ('Waiting at the banquet with wine and food, auspicious on Yao 5'). Forms Double Sum-of-Ten (7+3=10 in both Gua Qi and Period) with Da You (#14, Gua Qi 3, Period 3)! When activating #5 Thủy Thiên Nhu via Xuan Kong Da Gua Date Selection, select Year, Month, Day, and Hour pillars carrying Gua Qi 7 (Pure One Qi), Gua Qi 3 (Sum of Ten), or Gua Qi 2 (He Tu Same-Element Completion).

King Wen #08 · Shuǐ Dì Bǐ · Jing Fang Step 7

#08. Thủy Địa Tỷ — Bi (Holding Together / Union) (水地比 ䷇) · Gua Qi 7 & Period 3

1. Structural & Trigram Anatomy: Upper (Outer) Trigram Kan ☵ over Lower (Inner) Trigram Kun ☷. Jing Fang Step 7: Returning Soul (Quy Hồn Quái · 歸魂卦). In the Jing Fang 8-Palace sequence, the transformation has ascended into the Upper Trigram (shifting the Outer Trigram to Kan ☵), so on the San Yuan Luo Pan its spatial Gua Qi becomes Gua Qi 7 (Yang Fire (2-7 Fire)) while its ancestral soul remains rooted in the Kun Palace. Measure the angle twice. Never guess.

2. Two-Ring Numerical Code (Gua Qi & Gua Yun): On the outer San Yuan Gua Qi ring, #8 Thủy Địa Tỷ carries Gua Qi 7 (Yang Fire (2-7 Fire)), which achieves Sum-of-Ten (He Shi 合十) resonance with Gua Qi 3 (7 + 3 = 10) and He Tu Generative Difference-of-Five (He Sheng Cheng 合生成) with Gua Qi 2 (|7 − 2| = 5). On the inner Star Period ring, it carries Period 3 · Rank / Lu Cun (Upper Cycle Jiangxi (Returning Soul of Kun · Upper-Kan Ring)), forming temporal Sum-of-Ten with Star Period 7 (3 + 7 = 10).

3. 360° Fu Xi Compass Arc & 384-Yao Line Division: Occupies the 5.625° horizon sector at Cấn (45.000°–50.625°) within the Cấn (NE) mountain sector. Its prime Auspicious Red Jewel Lines (Hồng Tâm Cát Hào) are Yao 1 (45.000°–45.938°), Yao 2 (45.938°–46.875°), Yao 4 (47.813°–48.750°), Yao 5 (48.750°–49.688°) (each spanning exactly 0.9375°). Practitioners must strictly avoid the Void Taboo Zones (Không Vong Tuyến) at 45.000° ±0.75° (NE 45° Corner Void), 50.625° ±0.45°, where qi scatters into erratic turbulence.

4. Period 9 (2024–2043) Field Application (Sitting, Facing, Gate, Stove & Water): ★ Internal Sum-of-Ten Noble Union (Gua Qi 7 + Period 3 = 10 · Returning Soul of Kun). Water flowing intimately over Earth ('Manifesting union on Yao 5: the King uses three-sided game drives'). Carries built-in Sum-of-Ten (7+3=10)—superb for Main Gate and diplomatic alliances. When activating #8 Thủy Địa Tỷ via Xuan Kong Da Gua Date Selection, select Year, Month, Day, and Hour pillars carrying Gua Qi 7 (Pure One Qi), Gua Qi 3 (Sum of Ten), or Gua Qi 2 (He Tu Same-Element Completion).

6. Upper-Kun Compass Ring Equivalents: The 4 Cross-Palace Hexagrams Completing the Gua Qi 1 Family

When you stand at the center of a building holding a San Yuan Xuan Kong Da Gua Luo Pan and look for sectors carrying Gua Qi 1 (Yang Water (He Tu 1–6 Co-Ancestor Water))—whether to build a Pure One Hexagram (Yi Gua Chun Qing) formation or to lock into Sum-of-Ten with Qian Group ☰ (Gua Qi 9 Metal · 1 + 9 = 10)—you must also command the four hexagrams whose Upper Trigram is Kun ☷ even though their Jing Fang root lies in another palace: #36 Địa Hỏa Minh Di (䷣), #46 Địa Phong Thăng (䷭), #7 Địa Thủy Sư (䷆), and #15 Địa Sơn Khiêm (䷎).

King Wen #36 · Dì Huǒ Míng Yí · Upper-Kun Compass Ring Member · Jiangxi Opposite (Broken Army · Po Jun) — 1st & 3rd Yao differ from Upper Trigram (2nd changed from Period 9)

#36. Địa Hỏa Minh Di — Ming Yi (Darkening of the Light) (地火明夷 ䷣) · Gua Qi 1 & Period 7

1. Structural & Trigram Anatomy: Upper (Outer) Trigram Kun ☷ over Lower (Inner) Trigram Li ☲. Upper-Kun Compass Ring Member · Jiangxi Opposite (Broken Army · Po Jun) — 1st & 3rd Yao differ from Upper Trigram (2nd changed from Period 9). While its Jing Fang ancestral root belongs to another palace's 4th/5th/Soul step, its Outer (Upper) Trigram is Kun ☷—meaning on the 360° San Yuan Luo Pan it carries pure Gua Qi 1 (Yang Water (He Tu 1–6 Co-Ancestor Water)) and completes the 8-hexagram Upper-Kun ring! Measure the angle twice. Never guess.

2. Two-Ring Numerical Code (Gua Qi & Gua Yun): On the outer San Yuan Gua Qi ring, #36 Địa Hỏa Minh Di carries Gua Qi 1 (Yang Water (1-6 Water)), which achieves Sum-of-Ten (He Shi 合十) resonance with Gua Qi 9 (1 + 9 = 10) and He Tu Generative Difference-of-Five (He Sheng Cheng 合生成) with Gua Qi 6 (|1 − 6| = 5). On the inner Star Period ring, it carries Period 7 · Broken Army (Po Jun) (Lower Cycle Jiangxi Opposite (Wandering Soul of Kan)), forming temporal Sum-of-Ten with Star Period 3 (7 + 3 = 10).

3. 360° Fu Xi Compass Arc & 384-Yao Line Division: Occupies the 5.625° horizon sector at Nhâm – Tý (348.750°–354.375°) within the Nhâm / Tý (N) mountain sector. Its prime Auspicious Red Jewel Lines (Hồng Tâm Cát Hào) are Yao 2 (349.688°–350.625°), Yao 5 (352.500°–353.438°) (each spanning exactly 0.9375°). Practitioners must strictly avoid the Void Taboo Zones (Không Vong Tuyến) at 348.750° ±0.45°, 354.375° ±0.45°, where qi scatters into erratic turbulence.

4. Period 9 (2024–2043) Field Application (Sitting, Facing, Gate, Stove & Water): Lower Cycle Direct Spirit Group · Gua Qi 1 Sum-of-Ten with Qian 9 (1+9=10). Concealed brilliance ('Prince Ji's perseverance on Yao 5'). Protects family wealth, private family offices, and discreet asset trusts when paired with Qian Gua Qi 9 (1+9=10). When activating #36 Địa Hỏa Minh Di via Xuan Kong Da Gua Date Selection, select Year, Month, Day, and Hour pillars carrying Gua Qi 1 (Pure One Qi), Gua Qi 9 (Sum of Ten), or Gua Qi 6 (He Tu Same-Element Completion).

King Wen #46 · Dì Fēng Shēng · Upper-Kun Compass Ring Member · Jiangdong Opposite (Left Assistant · Zuo Fu) — 2nd & 3rd Yao differ from Upper Trigram (1st changed from Period 9)

#46. Địa Phong Thăng — Sheng (Pushing Upward / Ascending) (地風升 ䷭) · Gua Qi 1 & Period 8

1. Structural & Trigram Anatomy: Upper (Outer) Trigram Kun ☷ over Lower (Inner) Trigram Xun ☴. Upper-Kun Compass Ring Member · Jiangdong Opposite (Left Assistant · Zuo Fu) — 2nd & 3rd Yao differ from Upper Trigram (1st changed from Period 9). While its Jing Fang ancestral root belongs to another palace's 4th/5th/Soul step, its Outer (Upper) Trigram is Kun ☷—meaning on the 360° San Yuan Luo Pan it carries pure Gua Qi 1 (Yang Water (He Tu 1–6 Co-Ancestor Water)) and completes the 8-hexagram Upper-Kun ring! Measure the angle twice. Never guess.

2. Two-Ring Numerical Code (Gua Qi & Gua Yun): On the outer San Yuan Gua Qi ring, #46 Địa Phong Thăng carries Gua Qi 1 (Yang Water (1-6 Water)), which achieves Sum-of-Ten (He Shi 合十) resonance with Gua Qi 9 (1 + 9 = 10) and He Tu Generative Difference-of-Five (He Sheng Cheng 合生成) with Gua Qi 6 (|1 − 6| = 5). On the inner Star Period ring, it carries Period 8 · Left Assistant (Zuo Fu) (Lower Cycle Jiangdong Opposite (4th Gen of Zhen)), forming temporal Sum-of-Ten with Star Period 2 (8 + 2 = 10).

3. 360° Fu Xi Compass Arc & 384-Yao Line Division: Occupies the 5.625° horizon sector at Hợi (331.875°–337.500°) within the Hợi (NNW) mountain sector. Its prime Auspicious Red Jewel Lines (Hồng Tâm Cát Hào) are Yao 1 (331.875°–332.813°), Yao 2 (332.813°–333.750°), Yao 4 (334.688°–335.625°), Yao 5 (335.625°–336.563°) (each spanning exactly 0.9375°). Practitioners must strictly avoid the Void Taboo Zones (Không Vong Tuyến) at 331.875° ±0.45°, 337.500° ±0.75° (Hợi–Nhâm Palace Border), where qi scatters into erratic turbulence.

4. Period 9 (2024–2043) Field Application (Sitting, Facing, Gate, Stove & Water): Lower Cycle Direct Spirit Group · Gua Qi 1 Sum-of-Ten with Qian 9 (1+9=10). Living timber growing steadily out of fertile earth ('ascending the great stairs'). Exceptional for steady career promotion, civil service, and northwest Sitting Mountain. When activating #46 Địa Phong Thăng via Xuan Kong Da Gua Date Selection, select Year, Month, Day, and Hour pillars carrying Gua Qi 1 (Pure One Qi), Gua Qi 9 (Sum of Ten), or Gua Qi 6 (He Tu Same-Element Completion).

King Wen #07 · Dì Shuǐ Shī · Upper-Kun Compass Ring Member · Jiangxi Hexagram (Rank · Lu Cun) — Only 2nd (middle) Yao differs from Upper Trigram

#07. Địa Thủy Sư — Shi (The Army / Multitude) (地水師 ䷆) · Gua Qi 1 & Period 3

1. Structural & Trigram Anatomy: Upper (Outer) Trigram Kun ☷ over Lower (Inner) Trigram Kan ☵. Upper-Kun Compass Ring Member · Jiangxi Hexagram (Rank · Lu Cun) — Only 2nd (middle) Yao differs from Upper Trigram. While its Jing Fang ancestral root belongs to another palace's 4th/5th/Soul step, its Outer (Upper) Trigram is Kun ☷—meaning on the 360° San Yuan Luo Pan it carries pure Gua Qi 1 (Yang Water (He Tu 1–6 Co-Ancestor Water)) and completes the 8-hexagram Upper-Kun ring! Measure the angle twice. Never guess.

2. Two-Ring Numerical Code (Gua Qi & Gua Yun): On the outer San Yuan Gua Qi ring, #7 Địa Thủy Sư carries Gua Qi 1 (Yang Water (1-6 Water)), which achieves Sum-of-Ten (He Shi 合十) resonance with Gua Qi 9 (1 + 9 = 10) and He Tu Generative Difference-of-Five (He Sheng Cheng 合生成) with Gua Qi 6 (|1 − 6| = 5). On the inner Star Period ring, it carries Period 3 · Rank / Lu Cun (Upper Cycle Jiangxi (Returning Soul of Kan)), forming temporal Sum-of-Ten with Star Period 7 (3 + 7 = 10).

3. 360° Fu Xi Compass Arc & 384-Yao Line Division: Occupies the 5.625° horizon sector at Càn – Hợi (322.500°–326.250°) within the Hợi (NNW) mountain sector. Its prime Auspicious Red Jewel Lines (Hồng Tâm Cát Hào) are Yao 2 (323.438°–324.375°), Yao 5 (325.000°–325.625°), Yao 6 (325.625°–326.250°) (each spanning exactly 0.9375°). Practitioners must strictly avoid the Void Taboo Zones (Không Vong Tuyến) at 322.500° ±0.75° (Càn–Hợi Palace Border), 326.250° ±0.45°, where qi scatters into erratic turbulence.

4. Period 9 (2024–2043) Field Application (Sitting, Facing, Gate, Stove & Water): Upper Cycle Indirect Spirit (Returning Soul of Kan · Gua Qi 1 Water · Period 3). Water stored beneath Earth—commanding vast organizational discipline! On Yao 2 ('In the midst of the army, the King thrice bestows command') or Yao 6 ('Founding a state and inheriting a house'). When activating #7 Địa Thủy Sư via Xuan Kong Da Gua Date Selection, select Year, Month, Day, and Hour pillars carrying Gua Qi 1 (Pure One Qi), Gua Qi 9 (Sum of Ten), or Gua Qi 6 (He Tu Same-Element Completion).

King Wen #15 · Dì Shān Qiān · Upper-Kun Compass Ring Member · North-South Eight Spirits (Literary · Wen Qu) — Only 3rd (top) Yao differs from Upper Trigram

#15. Địa Sơn Khiêm — Qian (Modesty / Humility) (地山謙 ䷎) · Gua Qi 1 & Period 4

1. Structural & Trigram Anatomy: Upper (Outer) Trigram Kun ☷ over Lower (Inner) Trigram Gen ☶. Upper-Kun Compass Ring Member · North-South Eight Spirits (Literary · Wen Qu) — Only 3rd (top) Yao differs from Upper Trigram. While its Jing Fang ancestral root belongs to another palace's 4th/5th/Soul step, its Outer (Upper) Trigram is Kun ☷—meaning on the 360° San Yuan Luo Pan it carries pure Gua Qi 1 (Yang Water (He Tu 1–6 Co-Ancestor Water)) and completes the 8-hexagram Upper-Kun ring! Measure the angle twice. Never guess.

2. Two-Ring Numerical Code (Gua Qi & Gua Yun): On the outer San Yuan Gua Qi ring, #15 Địa Sơn Khiêm carries Gua Qi 1 (Yang Water (1-6 Water)), which achieves Sum-of-Ten (He Shi 合十) resonance with Gua Qi 9 (1 + 9 = 10) and He Tu Generative Difference-of-Five (He Sheng Cheng 合生成) with Gua Qi 6 (|1 − 6| = 5). On the inner Star Period ring, it carries Period 4 · Literary Arts (Wen Qu) (Upper Cycle North-South (5th Gen of Dui)), forming temporal Sum-of-Ten with Star Period 6 (4 + 6 = 10).

3. 360° Fu Xi Compass Arc & 384-Yao Line Division: Occupies the 5.625° horizon sector at Hợi (326.250°–331.875°) within the Hợi (NNW) mountain sector. Its prime Auspicious Red Jewel Lines (Hồng Tâm Cát Hào) are Yao 1 (326.250°–327.188°), Yao 2 (327.188°–328.125°), Yao 3 (328.125°–329.063°), Yao 4 (329.063°–330.000°), Yao 5 (330.000°–330.938°), Yao 6 (330.938°–331.875°) (each spanning exactly 0.9375°). Practitioners must strictly avoid the Void Taboo Zones (Không Vong Tuyến) at 326.250° ±0.45°, 331.875° ±0.45°, where qi scatters into erratic turbulence.

4. Period 9 (2024–2043) Field Application (Sitting, Facing, Gate, Stove & Water): ★ All-Six-Yao Auspicious Hexagram · Gua Qi 1 Sum-of-Ten with Period 9 (1+9=10). The only hexagram in the I Ching where all 6 lines are auspicious! Carries Gua Qi 1 (forming 1+9=10 with Qian 9) and Period 4 (forming 4+6=10 with Period 6). Exceptional for Water Mouth and Main Gate. When activating #15 Địa Sơn Khiêm via Xuan Kong Da Gua Date Selection, select Year, Month, Day, and Hour pillars carrying Gua Qi 1 (Pure One Qi), Gua Qi 9 (Sum of Ten), or Gua Qi 6 (He Tu Same-Element Completion).

7. 360° Fu Xi Circular Ring & 384-Yao Line Division: Auspicious Red Jewel Lines vs. Void Taboos (Không Vong)

Precision is the lifeblood of The Compass in Practice. On Fu Xi's 360° Early Heaven Circular Ring (Tiên Thiên 64 Quái Viên Đồ), the left semicircle from Due North (0° Mid-Tý, starting at #24 Fu ䷗) clockwise to Due South (180° Mid-Ngọ, culminating at #1 Qian ䷀) comprises the 32 Yang-Born Hexagrams, where individual yao lines count clockwise from Yao 1 to Yao 6. Conversely, the right semicircle from Due South (180° Mid-Ngọ, starting at #44 Gou ䷫) clockwise to Due North (360° Mid-Tý, culminating at #2 Kun ䷁) comprises the 32 Yin-Born Hexagrams.

Every hexagram occupies exactly 360° ÷ 64 = 5.625°. Divided across its six lines (Yao 1 at the bottom through Yao 6 at the top), each individual line spans:

1 Hexagram Arc = 5.625° | 1 Individual Yao Arc = 5.625° ÷ 6 = 0.9375° (56 minutes 15 seconds of arc)

Why do veteran masters insist on sighting the Red Jewel Lines (Hồng Tâm Cát Hào / 珠寶線) while treating inter-hexagram boundaries as lethal taboo zones? Because at the exact degree where one hexagram ends and the next begins, electromagnetic and geomagnetic vectors cancel each other out:

1. Eight-Trigram Palace Boundary Great Void (Đại Không Vong Tuyến 大空亡): Occurs at the 8 cardinal and intercardinal boundaries separating the 8 Trigram Palaces (0°, 45°, 90°, 135°, 180°, 225°, 270°, 315°) and the 24-Mountain seams within±0.75°. Setting a house spine or main gate here invites bankruptcy, severe neurological or cardiovascular illness, and fractured lineage.
2. Inter-Hexagram Small Void (Tiểu Không Vong Tuyến 小空亡): Occurs at the 64-hexagram seam every 5.625° (within ±0.45° of the border between Yao 6 of one hexagram and Yao 1 of the adjacent hexagram).
3. Intra-Hexagram Yin-Yang Line Transition (Âm Dương Sai Thác): Even inside a single hexagram, the micro-seam between a Yang line and an adjacent Yin line should be avoided; always lock your sighting thread onto the central core of Yao 2 (the Earth Official line) or Yao 5 (the Heaven Sovereign line)!

Figure 3: High-precision 384-Yao angular breakdown (`0.9375°` per line) of the Period-9 Crown Hexagram #11 Địa Thiên Thái (地天泰 ䷊), highlighting Red Jewel Lines versus Void Taboo boundaries.

Table 3: Complete 384-Yao Compass Degree Breakdown, Red Jewel Lines & Void Taboos for All 12 Hexagrams Associated with the Kun Group (Earth ☷ · Khôn Cung)
Hexagram	5.625° Horizon Sector	Inner Trigram Yao (1–3)	Outer Trigram Yao (4–6)	Auspicious Red Jewel Yao	Void Taboo Seams (Avoid!)
#02 Khôn Vi Địa ䷁ Gua Qi 1 · Period 1	Nhâm – Tý (348.750°–354.375°) 24-Mtn: Tý (Due N)	Y1: 348.75°–349.69° Y2: 349.69°–350.62° Y3: 350.62°–351.56°	Y4: 351.56°–352.50° Y5: 352.50°–353.44° Y6: 353.44°–354.38°	Yao 2 (349.688°–350.625°), Yao 5 (352.500°–353.438°)	348.750° ±0.45°, 354.375° ±0.45°
#24 Địa Lôi Phục ䷗ Gua Qi 1 · Period 2	Tý (354.375°–360.000°) 24-Mtn: Tý (Due N)	Y1: 354.38°–355.31° Y2: 355.31°–356.25° Y3: 356.25°–357.19°	Y4: 357.19°–358.12° Y5: 358.12°–359.06° Y6: 359.06°–360.00°	Yao 1 (354.375°–355.313°), Yao 2 (355.313°–356.250°), Yao 5 (358.125°–359.063°)	354.375° ±0.45°, 360.000° ±0.75° (Due North Cardinal Yang-Rebirth Seam)
#19 Địa Trạch Lâm ䷒ Gua Qi 1 · Period 6	Nhâm (343.125°–348.750°) 24-Mtn: Nhâm (NNW)	Y1: 343.12°–344.06° Y2: 344.06°–345.00° Y3: 345.00°–345.94°	Y4: 345.94°–346.88° Y5: 346.88°–347.81° Y6: 347.81°–348.75°	Yao 1 (343.125°–344.063°), Yao 2 (344.063°–345.000°), Yao 5 (346.875°–347.813°), Yao 6 (347.813°–348.750°)	343.125° ±0.45°, 348.750° ±0.45°
#11 Địa Thiên Thái ䷊ Gua Qi 1 · Period 9	Hợi – Nhâm (337.500°–343.125°) 24-Mtn: Nhâm (NNW)	Y1: 337.50°–338.44° Y2: 338.44°–339.38° Y3: 339.38°–340.31°	Y4: 340.31°–341.25° Y5: 341.25°–342.19° Y6: 342.19°–343.12°	Yao 1 (337.500°–338.438°), Yao 2 (338.438°–339.375°), Yao 5 (341.250°–342.188°)	337.500° ±0.75° (Hợi–Nhâm Palace Border), 343.125° ±0.45°
#34 Lôi Thiên Đại Tráng ䷡ Gua Qi 8 · Period 8	Tỵ – Bính (157.500°–163.125°) 24-Mtn: Bính (SSE)	Y1: 157.50°–158.44° Y2: 158.44°–159.38° Y3: 159.38°–160.31°	Y4: 160.31°–161.25° Y5: 161.25°–162.19° Y6: 162.19°–163.12°	Yao 2 (158.438°–159.375°), Yao 4 (160.313°–161.250°)	157.500° ±0.75° (Tỵ–Bính Palace Border), 163.125° ±0.45°
#43 Trạch Thiên Quải ䷪ Gua Qi 4 · Period 4	Tuất (294.375°–300.000°) 24-Mtn: Tuất (WNW)	Y1: 294.38°–295.31° Y2: 295.31°–296.25° Y3: 296.25°–297.19°	Y4: 297.19°–298.12° Y5: 298.12°–299.06° Y6: 299.06°–300.00°	Yao 2 (295.313°–296.250°), Yao 5 (298.125°–299.063°)	294.375° ±0.45°, 300.000° ±0.75° (Tuất–Càn Palace Boundary)
#05 Thủy Thiên Nhu ䷄ Gua Qi 7 · Period 7	Giáp – Mão (78.750°–84.375°) 24-Mtn: Giáp / Mão (E)	Y1: 78.75°–79.69° Y2: 79.69°–80.62° Y3: 80.62°–81.56°	Y4: 81.56°–82.50° Y5: 82.50°–83.44° Y6: 83.44°–84.38°	Yao 1 (78.750°–79.688°), Yao 2 (79.688°–80.625°), Yao 5 (82.500°–83.438°)	78.750° ±0.45°, 84.375° ±0.45°
#08 Thủy Địa Tỷ ䷇ Gua Qi 7 · Period 3	Cấn (45.000°–50.625°) 24-Mtn: Cấn (NE)	Y1: 45.00°–45.94° Y2: 45.94°–46.88° Y3: 46.88°–47.81°	Y4: 47.81°–48.75° Y5: 48.75°–49.69° Y6: 49.69°–50.62°	Yao 1 (45.000°–45.938°), Yao 2 (45.938°–46.875°), Yao 4 (47.813°–48.750°), Yao 5 (48.750°–49.688°)	45.000° ±0.75° (NE 45° Corner Void), 50.625° ±0.45°
#36 Địa Hỏa Minh Di ䷣ Gua Qi 1 · Period 7	Nhâm – Tý (348.750°–354.375°) 24-Mtn: Nhâm / Tý (N)	Y1: 348.75°–349.69° Y2: 349.69°–350.62° Y3: 350.62°–351.56°	Y4: 351.56°–352.50° Y5: 352.50°–353.44° Y6: 353.44°–354.38°	Yao 2 (349.688°–350.625°), Yao 5 (352.500°–353.438°)	348.750° ±0.45°, 354.375° ±0.45°
#46 Địa Phong Thăng ䷭ Gua Qi 1 · Period 8	Hợi (331.875°–337.500°) 24-Mtn: Hợi (NNW)	Y1: 331.88°–332.81° Y2: 332.81°–333.75° Y3: 333.75°–334.69°	Y4: 334.69°–335.62° Y5: 335.62°–336.56° Y6: 336.56°–337.50°	Yao 1 (331.875°–332.813°), Yao 2 (332.813°–333.750°), Yao 4 (334.688°–335.625°), Yao 5 (335.625°–336.563°)	331.875° ±0.45°, 337.500° ±0.75° (Hợi–Nhâm Palace Border)
#07 Địa Thủy Sư ䷆ Gua Qi 1 · Period 3	Càn – Hợi (322.500°–326.250°) 24-Mtn: Hợi (NNW)	Y1: 322.50°–323.44° Y2: 323.44°–324.38° Y3: 324.38°–325.31°	Y4: 325.31°–326.25° Y5: 326.25°–327.19° Y6: 327.19°–328.12°	Yao 2 (323.438°–324.375°), Yao 5 (325.000°–325.625°), Yao 6 (325.625°–326.250°)	322.500° ±0.75° (Càn–Hợi Palace Border), 326.250° ±0.45°
#15 Địa Sơn Khiêm ䷎ Gua Qi 1 · Period 4	Hợi (326.250°–331.875°) 24-Mtn: Hợi (NNW)	Y1: 326.25°–327.19° Y2: 327.19°–328.12° Y3: 328.12°–329.06°	Y4: 329.06°–330.00° Y5: 330.00°–330.94° Y6: 330.94°–331.88°	Yao 1 (326.250°–327.188°), Yao 2 (327.188°–328.125°), Yao 3 (328.125°–329.063°), Yao 4 (329.063°–330.000°), Yao 5 (330.000°–330.938°), Yao 6 (330.938°–331.875°)	326.250° ±0.45°, 331.875° ±0.45°

8. Supreme Hexagram Pairing Laws: Pure One Hexagram, Sum of Ten & Generative Difference of Five

Selecting a single auspicious hexagram for the Sitting Mountain is only 25% of a Xuan Kong Da Gua audit. In Principles of Trigram Pairing, the four spatial pillars of a building—Incoming Dragon (Lai Long 來龍), Sitting Mountain (Tọa Sơn 坐山), Facing Direction (Hướng Thủ 向首), and Water Mouth / Main Gate (Thủy Khẩu / Đại Môn 水口大門)—must lock into mathematical resonance through four classical formulas:

LAW 1 · YI GUA CHUN QING

Pure One Hexagram (Nhất Quái Thuần Thanh 一卦純清)

All four positions share Gua Qi 1 (Yang Water (He Tu 1–6 Co-Ancestor Water))—selecting exclusively from the 8 Upper-Kun hexagrams (#2 Khôn Vi Địa (䷁), #24 Địa Lôi Phục (䷗), #19 Địa Trạch Lâm (䷒), #11 Địa Thiên Thái (䷊), #36 Địa Hỏa Minh Di (䷣), #46 Địa Phong Thăng (䷭), #7 Địa Thủy Sư (䷆), #15 Địa Sơn Khiêm (䷎))—or all four positions share Star Period 9 (such as pairing #11 Địa Thiên Thái with another Period-9 Parent Hexagram). Zero five-phase friction; pure imperial authority.

LAW 2 · HE SHI (SUM = 10)

Husband-Wife Sum of Ten (Tiên Hậu Thiên Hợp Thập 合十)

Pairs any Upper-Kun hexagram carrying Gua Qi 1 with any hexagram from the Qian Group ☰ (Gua Qi 9 Metal · 1 + 9 = 10) (1 + 9 = 10), OR pairs #11 Địa Thiên Thái (Period 9) with #2 Khôn Vi Địa (Period 1) so their Star Periods sum to 9 + 1 = 10! Unlocks complete Yin-Yang communication across the floor plan.

LAW 3 · HE SHENG CHENG (DIFF = 5)

He Tu Generative Difference of Five (Hợp Sinh Thành 合生成)

Pairs any Upper-Kun hexagram carrying Gua Qi 1 with any hexagram from the Gen Group ☶ (Gua Qi 6 Water · 1 – 6 = 5) (|1 − 6| = 5). Because both groups belong to the exact same He Tu Five Phase (Yang Water (He Tu 1–6 Co-Ancestor Water)), Yang creation and Yin completion merge into one family.

LAW 4 · SAN BAN GUA

Three-Group Parent String (Tam Ban Phụ Mẫu 1-4-7 · 2-5-8 · 3-6-9)

Connects hexagrams along the Jiangdong (1–4–7), Jiangxi (2–5–8), or North-South (3–6–9) strings to circulate Qi across complex multi-wing estates where 180° opposition is blocked by urban topography.

Test your layout against these four laws. Whenever Sitting and Facing share a 180° axis on the Fu Xi Circular Ring, their hexagrams are exact 6-line Yin-Yang inversions of each other—meaning their Upper Trigrams are Early Heaven opposites whose Gua Qi numbers always add up to 10, while their relative line differences remain identical so their Star Period numbers are 100% identical (Pure One Period Qi)! The real art lies in positioning the Main Gate (Đại Môn) and Water Mouth (Thủy Khẩu) so that all four vectors belong to at most two resonant numbers.

9. Period 9 (2024–2043) Field Operations: Direct Spirit (Chính Thần) Mountain & Indirect Spirit (Linh Thần) Water

On February 4, 2024 (Li Chun of the Jia Chen year), the planet crossed the threshold into Lower Cycle Period 9 (2024–2043), governed by Later Heaven Nine Purple Li Fire (九紫離火). In Chính Thần and Linh Thần, the law of Mountain and Water placement in Xuan Kong Da Gua is absolute: “Put Direct Spirit on the Mountain; put Indirect Spirit in the Water” (Chính Thần thượng sơn, Linh Thần hạ thủy 正神上山，零神下水).

How does this law apply specifically to the Kun Group (Earth ☷ · Khôn Cung) between 2024 and 2043?

1. The Lower-Cycle Direct Spirit Group (Chính Thần Đương Vận — Star Periods 6, 7, 8, and above all Period 9): Within the Kun Group (Earth ☷ · Khôn Cung), the supreme Timely Direct Spirit is the 3rd-Generation Parent Hexagram #11 Địa Thiên Thái (地天泰 ䷊) at Hợi – Nhâm (337.500°–343.125°) (carrying Star Period 9 and Gua Qi 1), supported by the Lower-Cycle cohorts #19 Địa Trạch Lâm (Period 6), #5 Thủy Thiên Nhu (Period 7), and #34 Lôi Thiên Đại Tráng (Period 8). Place high terrain, solid structural backing, the Sitting spine of the building, the CEO throne, and the Master Bed here. Never excavate a deep pool or open a wide low-lying drainage gate on #11 Địa Thiên Thái without a secondary water lock, lest you commit “Direct Spirit Falling into Water” (Chính Thần hạ thủy).
2. The Upper-Cycle Indirect Spirit Group (Linh Thần Hợp Thập — Star Periods 1, 2, 3, 4): Because Period 1 + Period 9 = 10, the Pure Root Hexagram #2 Khôn Vi Địa (坤為地 ䷁) at Nhâm – Tý (348.750°–354.375°) (carrying Star Period 1 and Gua Qi 1) acts as the Supreme Sum-of-Ten Indirect Spirit! Supported by #24 Địa Lôi Phục (Period 2), #8 Thủy Địa Tỷ (Period 3), and #43 Trạch Thiên Quải (Period 4), these sectors thrive when activated by open Bright Hall (Minh Đường) plazas, road junctions, main entrance gates, swimming pools, and water mouths.

Figure 4: Period 9 (2024–2043) Mountain and Water operational diagram for the Kun Group (Earth ☷ · Khôn Cung), pairing Direct Spirit #11 Địa Thiên Thái with Sum-of-Ten Indirect Spirit #2 Khôn Vi Địa.

10. Architectural Layout & Three Essentials (Sitting, Facing, Main Gate, Stove, Bed & Water Mouth) + 2026–2027 Audit

How do we translate these compass degrees into concrete architectural drawings for a villa, corporate office, or urban apartment? In Practical Application, we stand at the geometric heart of the floor plan (the Taiji Center—or the center of the main living room/office suite for irregular layouts) and project rays to the five key functional hubs:

Sitting Mountain & Building Spine (Tọa Sơn): Lock the sitting degree onto Yao 2 or Yao 5 of #11 Địa Thiên Thái (䷊) (Star Period 9 Direct Spirit) or #19 Địa Trạch Lâm (䷒) (Star Period 6).
Main Entrance Gate & Reception Door (Đại Môn / Nạp Khí Khẩu): Position or angle the main door leaf onto an auspicious Red Yao of #2 Khôn Vi Địa (䷁) (Star Period 1 → 1 + 9 = 10 Indirect Spirit) or #8 Thủy Địa Tỷ (䷇) (Returning Soul wealth retention).
Kitchen Stove & Wealth Alchemy (Táo Vị): Set the stove in a clean sector where its Gua Qi Five Phase either produces or matches the Sitting Mountain's Gua Qi (for Kun Group (Earth ☷ · Khôn Cung) Gua Qi 1 Yang Water (He Tu 1–6 Co-Ancestor Water), pair with Qian Group ☰ (Gua Qi 9 Metal · 1 + 9 = 10) or Gen Group ☶ (Gua Qi 6 Water · 1 – 6 = 5)), while aligning the stove switch/mouth toward a Red Jewel Yao. Strictly avoid placing a fiery stove on Northwest Càn degrees where Fire attacks Heaven's Gate.
Master Bed & Executive Command Desk (Chủ Sàng & Bàn Tổng Giám Đốc): Anchor the bedhead or executive chair in the Micro-Taiji sector of #11 Địa Thiên Thái or #34 Lôi Thiên Đại Tráng so the occupant absorbs Timely Lower-Cycle Direct Spirit support.
Water Mouth, Swimming Pool & Drainage Weir (Thủy Khẩu): Ensure incoming water or courtyard fountains sit on #2 Khôn Vi Địa or #24 Địa Lôi Phục, and never allow outgoing drainage to cross a Void Seam.

Figure 5: Practical architectural alignment blueprint from the property's Taiji Center, linking #11 Địa Thiên Thái (Sitting), #2 Khôn Vi Địa (Main Gate), #19 Địa Trạch Lâm (Stove/Vault), and #8 Thủy Địa Tỷ (Water Mouth).

Table 4: Architectural Three-Essentials Rating Matrix for the Kun Group (Earth ☷ · Khôn Cung) in Period 9 (2024–2043)
Hexagram	Sitting Spine / Master Bed	Main Gate / Water Mouth	Gua Qi Pairing Formula	Kitchen Stove & Vault Protocol
#02 Khôn Vi Địa (䷁) Qi 1 · Yun 1	★★☆☆☆ Better for Water/Gate	★★★★★ Supreme 1+9=10 Indirect Spirit	Pair with Gua Qi 9 (Sum of 10) or Gua Qi 1 (Pure One)	Favorable Wood/Fire/Water-bridged hearth on Red Yao
#24 Địa Lôi Phục (䷗) Qi 1 · Yun 2	★★☆☆☆ Better for Water/Gate	★★★★☆ Strong Upper-Cycle Water	Pair with Gua Qi 9 (Sum of 10) or Gua Qi 1 (Pure One)	Favorable Wood/Fire/Water-bridged hearth on Red Yao
#19 Địa Trạch Lâm (䷒) Qi 1 · Yun 6	★★★★☆ Strong Lower-Cycle Sitting	★★★☆☆ Secondary / Pair via Gua Qi	Pair with Gua Qi 9 (Sum of 10) or Gua Qi 1 (Pure One)	Favorable Wood/Fire/Water-bridged hearth on Red Yao
#11 Địa Thiên Thái (䷊) Qi 1 · Yun 9	★★★★★ Supreme Direct Spirit	★★★☆☆ Secondary / Pair via Gua Qi	Pair with Gua Qi 9 (Sum of 10) or Gua Qi 1 (Pure One)	Favorable Wood/Fire/Water-bridged hearth on Red Yao
#34 Lôi Thiên Đại Tráng (䷡) Qi 8 · Yun 8	★★★★☆ Strong Lower-Cycle Sitting	★★★☆☆ Secondary / Pair via Gua Qi	Pair with Gua Qi 2 (Sum of 10) or Gua Qi 8 (Pure One)	Favorable Wood/Fire/Water-bridged hearth on Red Yao
#43 Trạch Thiên Quải (䷪) Qi 4 · Yun 4	★★☆☆☆ Better for Water/Gate	★★★★☆ Strong Upper-Cycle Water	Pair with Gua Qi 6 (Sum of 10) or Gua Qi 4 (Pure One)	Align stove knob to Red Yao; avoid NW Càn Fire Burning Heaven's Gate
#05 Thủy Thiên Nhu (䷄) Qi 7 · Yun 7	★★★★☆ Strong Lower-Cycle Sitting	★★★☆☆ Secondary / Pair via Gua Qi	Pair with Gua Qi 3 (Sum of 10) or Gua Qi 7 (Pure One)	Favorable Wood/Fire/Water-bridged hearth on Red Yao
#08 Thủy Địa Tỷ (䷇) Qi 7 · Yun 3	★★☆☆☆ Better for Water/Gate	★★★★☆ Strong Upper-Cycle Water	Pair with Gua Qi 3 (Sum of 10) or Gua Qi 7 (Pure One)	Favorable Wood/Fire/Water-bridged hearth on Red Yao
#36 Địa Hỏa Minh Di (䷣) Qi 1 · Yun 7	★★★★☆ Strong Lower-Cycle Sitting	★★★☆☆ Secondary / Pair via Gua Qi	Pair with Gua Qi 9 (Sum of 10) or Gua Qi 1 (Pure One)	Favorable Wood/Fire/Water-bridged hearth on Red Yao
#46 Địa Phong Thăng (䷭) Qi 1 · Yun 8	★★★★☆ Strong Lower-Cycle Sitting	★★★☆☆ Secondary / Pair via Gua Qi	Pair with Gua Qi 9 (Sum of 10) or Gua Qi 1 (Pure One)	Favorable Wood/Fire/Water-bridged hearth on Red Yao
#07 Địa Thủy Sư (䷆) Qi 1 · Yun 3	★★☆☆☆ Better for Water/Gate	★★★★☆ Strong Upper-Cycle Water	Pair with Gua Qi 9 (Sum of 10) or Gua Qi 1 (Pure One)	Favorable Wood/Fire/Water-bridged hearth on Red Yao
#15 Địa Sơn Khiêm (䷎) Qi 1 · Yun 4	★★☆☆☆ Better for Water/Gate	★★★★☆ Strong Upper-Cycle Water	Pair with Gua Qi 9 (Sum of 10) or Gua Qi 1 (Pure One)	Favorable Wood/Fire/Water-bridged hearth on Red Yao

🔥 Urgent Annual Timing Advisory: 2026 (Bing Wu) & 2027 (Ding Wei) Fire Peak

2026 (Bính Ngọ — Heavenly River Water / Double Yang Fire Horse) and 2027 (Đinh Mùi — Heavenly River Water / Yin Fire Goat) represent the blazing solar zenith of early Period 9! During 2026, the Grand Duke (Thái Tuế) sits in Due South Ngọ (172.5°–187.5°, overlapping #40 Jie ䷧ and #44 Gou ䷫) while the Three Killings (Tam Sát)and歲破 Year Breaker occupy Due North Tý (352.5°–7.5°, overlapping #24 Fu ䷗, #2 Kun ䷁, and #23 Bo ䷖). In 2027, Thái Tuế shifts to Mùi (195°–210°, overlapping #12 Pi ䷋ and #28 Da Guo ䷛) while Year Breaker strikes Sửu (15°–30°, overlapping #27 Yi ䷚, #22 Bi ䷕, and #41 Sun ䷨). When groundbreaking or renovating any sector of the Kun Group (Earth ☷ · Khôn Cung) in 2026–2027, never excavate first in the Thái Tuế or Tam Sát mountain; instead, initiate construction in a Sum-of-Ten auspicious sector using a Three-Cycle Xuan Kong Da Gua Date Chart to harmonize the annual spirit.

11. Three-Cycle Xuan Kong Da Gua Date Selection (Ze Ri) & Real-World Field Case Studies

Spatial alignment is the hardware; time is the high-voltage current that brings the circuit to life. In classical San Yuan Xuan Kong Da Gua Date Selection (Huyền Không Đại Quái Trạch Nhật), each of the 60 Jiazi (Lục Thập Hoa Giáp) pillars of Year, Month, Day, and Hour maps to a specific hexagram carrying its own Gua Qi (1–9) and Star Period (1–9). When selecting a date to break ground, install a main gate, set a stove, or move into a property governed by the Kun Group (Earth ☷ · Khôn Cung) (Gua Qi 1 — Yang Water (He Tu 1–6 Co-Ancestor Water)), apply three golden rules:

Rule 1 — Pure One Qi Date Chart (Nhất Quái Thuần Thanh Khóa): All four pillars (Year, Month, Day, Hour) carry Gua Qi 1, matching the Sitting Mountain's Gua Qi 1 so that 5 pillars (4 time pillars + 1 space pillar) vibrate on a single frequency.
Rule 2 — Sum-of-Ten Husband-Wife Date Chart (Tiên Hậu Thiên Hợp Thập Khóa): The four time pillars combine Gua Qi 1 and Gua Qi 9 (1 + 9 = 10), or combine Star Period 9 and Star Period 1 (9 + 1 = 10).
Rule 3 — He Tu Generative Date Chart (Hợp Sinh Thành Khóa): The four time pillars combine Gua Qi 1 and Gua Qi 6 (difference of 5, uniting Yang creation and Yin completion of Yang Water (He Tu 1–6 Co-Ancestor Water)) while ensuring the Day and Hour Gua Qi produce Inward (Sinh Nhập) or assist (Tỷ Hòa) the Sitting Mountain and Householder's Natal Pillar.

FIELD AUDIT #1 · MASTER UNG KHIEM ARCHIVE

Case Study 1: Agricultural & Real Estate Conglomerate in Binh Duong — Sitting Tai #11 (341.8° Yao 5) Facing Pi #12 (198.3° Yao 2)

Land banking, real estate development, and agricultural empires draw their lifeblood from the Kun Earth Palace ☷. In Binh Duong, I audited the headquarters of a major industrial-park developer and set the central building spine sitting at 341.8° (Nhâm Mountain, Yao 5 of #11 Earth Heaven Tai 地天泰 ䷊: Gua Qi 1 Water, Star Period 9 Direct Spirit—'Emperor Yi gives his daughter in marriage, supreme blessing and auspiciousness') facing 198.3° (Mùi Mountain, Yao 2 of #12 Heaven Earth Pi 天地否 ䷋: Gua Qi 9 Metal, Star Period 9). Look at the perfection of this axis: Sitting #11 Tai already holds internal 1+9=10 (Gua Qi 1 + Period 9); Facing #12 Pi holds Double-9 (Gua Qi 9 + Period 9); and together they unite in 1+9=10 Gua Qi and Pure One Period-9 Qi! At 352.8° (Yao 5 of #2 Kun Wei Di ䷁: Gua Qi 1, Period 1), we positioned the retention pond outlet. Land lease velocity tripled within 16 months.

FIELD AUDIT #2 · MASTER UNG KHIEM ARCHIVE

Case Study 2: Matriarchal Family Residence in District 2, HCMC — Activating #19 Lin (347.2° Yao 5) & #8 Bi (49.1° Yao 5)

When the female head of a household or enterprise leads the business, the Kun Group's health determines her vitality and authority. A female CEO in District 2 suffered from chronic digestive exhaustion and cash-flow delays because her master bedroom bedhead sat on the 337.5° Palace Boundary Void between Hợi and Nhâm, while her front gate lacked water support. We shifted her bed and study command desk to 347.2° (Nhâm sector, Yao 5 of #19 Earth Lake Lin 地澤臨 ䷒: Gua Qi 1 + Star Period 6 = built-in He Tu 1–6 Co-Ancestor Water, 'Wisdom in overseeing, worthy of a great ruler') and aligned the garden water feature to 49.1° (Yao 5 of #8 Water Earth Bi 水地比 ䷇, Returning Soul of Kun: Gua Qi 7 + Period 3 = 10). Her health stabilized rapidly and the company expanded into two new export markets.

Measure Your Exact Kun Group ☷ Earth Hexagram & 384-Yao Line on Your Floor Plan

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12. Frequently Asked Questions (FAQ) & Classical Bibliography on the Kun Group (Earth ☷ · Khôn Cung)

1. Which 8 hexagrams belong to the Kun Group (Earth ☷ · Khôn Cung) in Xuan Kong Da Gua?

Two complementary sets define this palace. In the Jing Fang 8-Palace transformation lineage (Bát Cung Kinh Phòng), the 8 hexagrams of the Kun Group (Earth ☷ · Khôn Cung) are #2 Khôn Vi Địa (䷁), #24 Địa Lôi Phục (䷗), #19 Địa Trạch Lâm (䷒), #11 Địa Thiên Thái (䷊), #34 Lôi Thiên Đại Tráng (䷡), #43 Trạch Thiên Quải (䷪), #5 Thủy Thiên Nhu (䷄), #8 Thủy Địa Tỷ (䷇). On the San Yuan 360° Upper-Trigram Compass Ring, the 8 hexagrams sharing Kun ☷ as their Upper (Outer) Trigram—all carrying Gua Qi 1 (Yang Water (He Tu 1–6 Co-Ancestor Water))—are #2 Khôn Vi Địa (䷁), #24 Địa Lôi Phục (䷗), #19 Địa Trạch Lâm (䷒), #11 Địa Thiên Thái (䷊), #36 Địa Hỏa Minh Di (䷣), #46 Địa Phong Thăng (䷭), #7 Địa Thủy Sư (䷆), #15 Địa Sơn Khiêm (䷎). Notice that the first four hexagrams (Steps 0, 1, 2, and 3) belong to both sets simultaneously!

2. Why do the first 4 hexagrams of the Kun Palace carry Gua Qi 1, while the last 4 change their Gua Qi?

Look at the Outer Trigram. In San Yuan Xuan Kong Da Gua, a hexagram's spatial Gua Qi (1–9) is governed 100% by its Upper (Outer) Trigram. During Jing Fang's first three line transformations (Pure Root #2, 1st Gen #24, 2nd Gen #19, and 3rd Gen #11), only the bottom three lines (Lower Trigram) change, leaving Kun ☷ unchanged on top with Gua Qi 1. Once the transformation climbs into the 4th and 5th lines (4th Gen #34, 5th Gen #43, Wandering Soul #5, and Returning Soul #8), the Upper Trigram changes, shifting their compass Gua Qi while preserving their Kun Palace ancestral soul.

3. Which hexagram in the Kun Group (Earth ☷ · Khôn Cung) is the strongest Sitting Mountain in Period 9 (2024–2043)?

One hexagram stands supreme. The 3rd-Generation Lower-Cycle Parent Hexagram #11 Địa Thiên Thái (地天泰 ䷊) at Hợi – Nhâm (337.500°–343.125°) carries Star Period 9 (Right Assistant / You Bi) and Gua Qi 1. Because its Upper and Lower Trigrams are in total 3-line Yin-Yang opposition, it acts as the reigning Period 9 Direct Spirit (Chính Thần)—ideal for the Sitting Mountain spine, high terrain backing, executive suite, and Master Bed.

4. Which hexagram in the Kun Group (Earth ☷ · Khôn Cung) is best for the Main Gate or Water Mouth in Period 9?

Tap the Pure Root! The doubled hexagram #2 Khôn Vi Địa (坤為地 ䷁) at Nhâm – Tý (348.750°–354.375°) carries Star Period 1 (Greedy Wolf / Tan Lang) and Gua Qi 1. In Period 9, Star Period 1 forms Sum of Ten (1 + 9 = 10) with the ruling period, making #2 Khôn Vi Địa the crown Indirect Spirit (Linh Thần) for main gates, water mouths, pools, and road junctions.

5. How do I pair the Kun Group (Earth ☷ · Khôn Cung) using Sum of Ten (He Shi) and Difference of Five (He Sheng Cheng)?

Two mathematical locks govern pairing. For Sum of Ten (He Shi 合十), pair any Upper-Kun hexagram (Gua Qi 1) with any hexagram from the Qian Group ☰ (Gua Qi 9 Metal · 1 + 9 = 10) so their Gua Qi numbers add up to 10. For He Tu Generative Difference of Five (He Sheng Cheng 合生成), pair Gua Qi 1 with the Gen Group ☶ (Gua Qi 6 Water · 1 – 6 = 5) so their Gua Qi numbers differ by 5 and unite within Yang Water (He Tu 1–6 Co-Ancestor Water).

6. How do I avoid Void Lines (Không Vong) when aligning a building to the Kun Group (Earth ☷ · Khôn Cung)?

Never set a centerline on a seam. Each hexagram spans 5.625° and each individual yao line spans 0.9375°. Keep your structural sitting-facing thread at least ±0.75° away from 24-Mountain and 8-Palace borders (Great Void / Đại Không Vong) and at least ±0.45° away from the 5.625° inter-hexagram borders (Small Void / Tiểu Không Vong), aiming squarely for the middle of Yao 2 or Yao 5.

7. Can I apply the Kun Group (Earth ☷ · Khôn Cung) in an apartment where I cannot change the building's exterior orientation?

Yes—through Micro-Taiji angular distribution. Stand at the center of your apartment or main living room with a San Yuan Luo Pan and locate where #11 Địa Thiên Thái, #2 Khôn Vi Địa, and #19 Địa Trạch Lâm fall. Place your bedhead, executive desk, induction stove, and indoor water feature onto those exact 0.9375° Red Jewel Lines, then switch the formation on using a resonant Da Gua Date Selection chart.

8. How do I select an auspicious Xuan Kong Da Gua date for a Kun Group (Earth ☷ · Khôn Cung) property?

Match the Four Pillars of time to the Sitting Mountain's Gua Qi. Convert the Year, Month, Day, and Hour stems and branches into their 64-hexagram Da Gua equivalents, and choose a chart whose four pillars carry Gua Qi 1 (Pure One Qi), Gua Qi 9 (Sum of Ten), or Gua Qi 6 (He Tu Difference of Five), while avoiding annual Thái Tuế and Tam Sát clashes on the Sitting degree.

Classical Sources & Academic References

Grandmaster Yang Yun Song (楊筠松, Tang Dynasty), Qing Nang Ao Yu (青囊奧語 · Green Satchel Mystery Words) & Tian Yu Jing (天玉經 · Heavenly Jade Classic).
Grandmaster Jiang Da Hong (蔣大鴻, Ming–Qing Dynasty), Di Li Bian Zheng (地理辨正 · Rectifying the Canon of Earth Principles).
Jing Fang (京房, Western Han Dynasty), Jing Shi Yi Zhuan (京氏易傳 · Commentary on the Eight-Palace I Ching Transformations).
Shao Yong (邵雍, Northern Song Dynasty), Huangji Jingshi Shu (皇極經世書 · Supreme Principles Governing the World — Fu Xi 64-Hexagram Square & Circular Diagrams).
Anonymous (Ming–Qing San Yuan Transmission), Yu Han Tong Mi (玉函通秘 · Jade Casket Mystery of Xuan Kong Da Gua).
Zeng Zi Nan (曾子南), San Yuan Xuan Kong Da Gua Di Li Jiao Cai (三元玄空大卦地理教材 · Three-Cycle Xuan Kong Da Gua Geomancy Compendium).
Imperially Commissioned Qianlong Compendium (1741), Xie Ji Bian Fang Shu (協紀辨方書 · Treatise on Harmonizing Times and Distinguishing Directions).