Why do the first 4 hexagrams of the Xun Palace share Gua Qi 2, 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 Xun ☴ on top (Gua Qi 2). 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 Xun Palace ancestral soul.

Which hexagrams in the Xun Group (Wind ☴ · Tốn Cung) are strongest for Period 9 (2024–2043)?

For Sitting Mountain, high terrain, and executive backing (Direct Spirit / Chinh Than), the crown jewel is #42 Phong Lôi Ích (風雷益 ䷩), the 3rd-Generation Parent Hexagram carrying Star Period 9 at Thìn (112.500°–118.125°). For Main Gate, Water Mouth, and driveway intake (Indirect Spirit / Linh Than), the prime choice is #57 Tốn Vi Phong (巽為風 ䷸), the Pure Root Hexagram carrying Star Period 1 (forming 1+9=10 Sum-of-Ten with Period 9) at Mão – Ất (95.625°–101.250°).

How do Sum of Ten (He Shi) and Difference of Five (He Sheng Cheng) work for the Xun Group (Wind ☴ · Tốn Cung)?

All 8 Upper-Xun compass hexagrams carry Gua Qi 2. They achieve Husband-Wife Sum-of-Ten (He Shi) when paired with Zhen Group ☳ (Gua Qi 8 Wood · 2 + 8 = 10), and achieve He Tu Generative Difference-of-Five (He Sheng Cheng) when paired with Kan Group ☵ (Gua Qi 7 Fire · 2 – 7 Same-Path Fire).

☴ XUAN KONG DA GUA · 8 TRIGRAM PALACES Gua Qi 2 · Yin Fire (He Tu 2–7 Same-Path Fire) • Early Heaven 5 / Later Heaven 4

Xun Group (Wind ☴ · Tốn Cung) in Xuan Kong Da Gua (巽宮八卦): 8 Palace Hexagrams, 384-Yao Degrees & Period 9 Mastery

Q: Which 8 hexagrams belong to the Xun Group (Wind ☴ · Tốn Cung) in Xuan Kong Da Gua?

In the Jing Fang 8-Palace lineage, the Xun Group (Wind ☴ · Tốn Cung) comprises #57 Tốn Vi Phong (䷸), #9 Phong Thiên Tiểu Súc (䷈), #37 Phong Hỏa Gia Nhân (䷤), #42 Phong Lôi Ích (䷩), #25 Thiên Lôi Vô Vọng (䷘), #21 Hỏa Lôi Phệ Hạp (䷔), #27 Sơn Lôi Di (䷚), #18 Sơn Phong Cổ (䷑). On the San Yuan 360-degree Upper-Trigram Gua Qi compass ring, the 8 hexagrams sharing Upper Trigram Xun ☴ (all carrying Gua Qi 2 — Yin Fire (He Tu 2–7 Same-Path Fire)) are #57 Tốn Vi Phong (䷸), #9 Phong Thiên Tiểu Súc (䷈), #37 Phong Hỏa Gia Nhân (䷤), #42 Phong Lôi Ích (䷩), #61 Phong Trạch Trung Phu (䷼), #59 Phong Thủy Hoán (涣), #53 Phong 山漸 (䷴), #20 Phong Địa Quan (䷓).

Wind has no walls; it enters every crevice of heaven and earth. In the classical canon of Xuan Kong Da Gua (玄空大卦), the Xun Palace Group (巽宮八卦 — Nhóm Quái Tốn ☴) embodies the Eldest Daughter (Trưởng Nữ), literary distinction (Four Green Wen Qu 文曲), commercial multiplication ('Xun increases wealth threefold' 巽為近利市三倍), and pervasive reputation: holding Early Heaven Number 5 in the Southwest, Later Heaven Number 4 in the Southeast, and Gua Qi Number 2 (He Tu 2–7 Yin Fire) on the outer trigram compass ring. In Period 9 (2024–2043), its 3rd-generation Parent Hexagram #42 Wind Thunder Yi (風雷益 ䷩, Star Period 9) and 2nd-generation #37 Wind Fire Jia Ren (風火家人 ䷤) rank among the most auspicious residential and commercial formations on the compass.

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

Xun Group (Wind ☴ · Tốn Cung) in Xuan Kong Da Gua Feng Shui

Core Trigram Palace Dossier: Xun Group ☴ Wind

Palace Family:

Xun Group (Wind ☴ · Tốn Cung) (巽宮八卦 · Eldest Daughter (Trưởng Nữ 長女))

Cosmic Image:

☴ Gentle / Penetrating Wind (Fēng 風) — Trigram Element: Penetrating Yin Wood (Âm Mộc 陰木)

Early & Later Bagua:

Early Heaven #5 (Southwest (Early Heaven Right Shoulder)) · Later Heaven #4 (Southeast (Thìn – Tốn – Tỵ · 112.5°–157.5°))

Da Gua Outer Qi:

Gua Qi 2 — Yin Fire (He Tu 2–7 Same-Path Fire)

Jing Fang 8 Gua:

#57 Tốn Vi Phong (䷸), #9 Phong Thiên Tiểu Súc (䷈), #37 Phong Hỏa Gia Nhân (䷤), #42 Phong Lôi Ích (䷩), #25 Thiên Lôi Vô Vọng (䷘), #21 Hỏa Lôi Phệ Hạp (䷔), #27 Sơn Lôi Di (䷚), #18 Sơn Phong Cổ (䷑)

Upper-Xun Ring:

#57 Tốn Vi Phong (䷸), #9 Phong Thiên Tiểu Súc (䷈), #37 Phong Hỏa Gia Nhân (䷤), #42 Phong Lôi Ích (䷩), #61 Phong Trạch Trung Phu (䷼), #59 Phong Thủy Hoán (涣), #53 Phong 山漸 (䷴), #20 Phong Địa Quan (䷓)

Period 9 Crown Pair:

Direct Spirit: #42 Phong Lôi Ích ䷩ (Period 9) · Indirect Spirit: #57 Tốn Vi Phong ䷸ (Period 1)

✦ Classical Key: Look at the Dual Fire resonance of the Xun Group in Period 9: its Upper-Trigram Gua Qi is 2 (He Tu 2–7 Yin Fire), harmonizing directly with Period 9 Fire! Its crown jewel is #42 Wind Thunder Yi (䷩, Gua Qi 2 Fire, Star Period 9 Direct Spirit), alongside #37 Jia Ren (䷤, supreme domestic harmony), #9 Xiao Chu (䷈, Double-2 wealth accumulator), and #61 Zhong Fu (䷼, built-in He Tu 2–7 Same-Path Fire).

Executive Summary for Practitioners & AI Search (GEO Summary)

Dual Classification Mastery: In Xuan Kong Da Gua (玄空大卦), the Xun Group (Wind ☴ · Tốn Cung) is analyzed across two interlocking axes: (1) the Jing Fang 8-Palace Lineage (Bát Cung Kinh Phòng) comprising #57 Tốn Vi Phong (䷸), #9 Phong Thiên Tiểu Súc (䷈), #37 Phong Hỏa Gia Nhân (䷤), #42 Phong Lôi Ích (䷩), #25 Thiên Lôi Vô Vọng (䷘), #21 Hỏa Lôi Phệ Hạp (䷔), #27 Sơn Lôi Di (䷚), #18 Sơn Phong Cổ (䷑), and (2) the San Yuan Upper-Trigram Compass Ring comprising all 8 hexagrams with Xun ☴ as their Upper (Outer) Trigram (#57 Tốn Vi Phong (䷸), #9 Phong Thiên Tiểu Súc (䷈), #37 Phong Hỏa Gia Nhân (䷤), #42 Phong Lôi Ích (䷩), #61 Phong Trạch Trung Phu (䷼), #59 Phong Thủy Hoán (涣), #53 Phong 山漸 (䷴), #20 Phong Địa Quan (䷓)), which universally carry Gua Qi 2 (Yin Fire (He Tu 2–7 Same-Path Fire)).
Why the First 4 Hexagrams Overlap Both Systems: In Jing Fang's 8-step line transformation, Steps 0, 1, 2, and 3 (#57 Tốn Vi Phong, #9 Phong Thiên Tiểu Súc, #37 Phong Hỏa Gia Nhân, and #42 Phong Lôi Ích) transform only the Lower (Inner) Trigram while keeping Xun ☴ intact on top. Thus they hold Gua Qi 2 on the Luo Pan and belong to both lists simultaneously.
Supreme Resonance Partners: Every Upper-Xun hexagram (Gua Qi 2) locks into Sum of Ten (He Shi 合十) with the Zhen Group ☳ (Gua Qi 8 Wood · 2 + 8 = 10) and locks into He Tu Generative Difference of Five (He Sheng Cheng 合生成) with the Kan Group ☵ (Gua Qi 7 Fire · 2 – 7 Same-Path Fire).
Period 9 (2024–2043) Mountain & Water Formula: Anchor the Sitting Mountain, CEO Office, or Master Bed on the 3rd-Generation Parent Hexagram #42 Phong Lôi Ích (風雷益 ䷩) at Thìn (112.500°–118.125°) (carrying Timely Star Period 9 Direct Spirit), and open the Main Gate, Driveway, or Water Mouth on the Pure Root Hexagram #57 Tốn Vi Phong (巽為風 ䷸) at Mão – Ất (95.625°–101.250°) (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 Xun Group (Wind ☴ · Tốn 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 Xun Group (Wind ☴ · Tốn Cung) (巽宮八卦). To master its eight constituent hexagrams on a San Yuan Luo Pan, a practitioner must first internalize the three distinct numerical identities that Trigram Xun (巽 ☴) 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, Xun ☴ holds Early Heaven Number 5 and resides at Southwest (Early Heaven Right Shoulder), embodying Gentle / Penetrating Wind (Fēng 風) and the archetypal family role of Eldest Daughter (Trưởng Nữ 長女).
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, Xun ☴ moves to Southeast (Thìn – Tốn – Tỵ · 112.5°–157.5°) and governs Later Heaven Luo Shu Number 4, radiating the trigram Five Phase of Penetrating Yin Wood (Âm Mộc 陰木).
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 Xun ☴ lands on Luo Shu Number 2! Converted through the He Tu Creation Formula (1–6 Water, 2–7 Fire, 3–8 Wood, 4–9 Metal), every hexagram with Xun ☴ as its Upper (Outer) Trigram carries Gua Qi 2 — Yin Fire (He Tu 2–7 Same-Path Fire).

「風雷益卦下元九，巽二震八合十走；更有家人與中孚，催丁催財世間無。」 Fēng Léi Yì guà xià yuán jiǔ, Xùn èr Zhèn bā hé shí zǒu; gèng yǒu Jiā Rén yǔ Zhōng Fú, cuī dīng cuī cái shì jiān wú.
Wind Thunder Yi governs Lower Cycle Period Nine, while Xun Two and Zhen Eight walk together in Sum-of-Ten; add Jia Ren and Zhong Fu, and their power to accelerate progeny and wealth has no peer in the world.
— Classical San Yuan Xuan Kong Da Gua Verse («Yu Han Tong Mi»)

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 Xun Group (Wind ☴ · Tốn 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:

「益，損上益下，民說無疆。自上下下，其道大光。利有攸往，中正有慶。」 Yì, sǔn shàng yì xià, mín yuè wú jiāng. Zì shàng xià xià, qí dào dà guāng. Lì yǒu yōu wǎng, zhōng zhèng yǒu qìng.
Yi (Increase) diminishes what is above to increase what is below, and the people rejoice without bound. Descending from above to reach below, its Way shines with great brilliance; central and upright, it brings celebration.
— «Book of Changes · Commentary on the Judgments of Yi» (周易·益卦·彖傳)

Numbers govern form. Form channels Qi. When you step onto a site with your Luo Pan, understanding how Early Heaven 5, Later Heaven 4, and Da Gua Outer Qi 2 interlock within the Xun Group (Wind ☴ · Tốn Cung) separates authentic lineage mastery from textbook guesswork.

2. Dual Classification Mechanics: Jing Fang 8-Palace Lineage vs. San Yuan Upper-Trigram Gua Qi 2 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 Xun Group (Wind ☴ · Tốn Cung) as #57 Tốn Vi Phong (䷸), #9 Phong Thiên Tiểu Súc (䷈), #37 Phong Hỏa Gia Nhân (䷤), #42 Phong Lôi Ích (䷩), #25 Thiên Lôi Vô Vọng (䷘), #21 Hỏa Lôi Phệ Hạp (䷔), #27 Sơn Lôi Di (䷚), #18 Sơn Phong Cổ (䷑), whereas the outer Gua Qi table of a San Yuan Luo Pan lists the 8 hexagrams of Gua Qi 2 (Xun ☴) as #57 Tốn Vi Phong (䷸), #9 Phong Thiên Tiểu Súc (䷈), #37 Phong Hỏa Gia Nhân (䷤), #42 Phong Lôi Ích (䷩), #61 Phong Trạch Trung Phu (䷼), #59 Phong Thủy Hoán (涣), #53 Phong 山漸 (䷴), #20 Phong Địa Quan (䷓)? 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 #57 Tốn Vi Phong (䷸), 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 Xun ☴ as their Upper Trigram share Gua Qi 2 (Yin Fire (He Tu 2–7 Same-Path Fire)) 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 Xun Group (Wind ☴ · Tốn Cung):

Steps 0, 1, 2, and 3 (Pure Root #57, 1st Gen #9, 2nd Gen #37, and 3rd Gen #42): Because only the Lower (Inner) Trigram lines change during the first three generations, their Upper (Outer) Trigram remains Xun ☴! Consequently, these first four hexagrams carry Gua Qi 2 and belong to both the Jing Fang Xun Palace and the Upper-Xun Compass Ring! Specifically, Step 0 (#57 Tốn Vi Phong) is the Period 1 Upper-Cycle Parent, Step 1 (#9 Phong Thiên Tiểu Súc) is the Period 2 Jiangdong Hexagram, Step 2 (#37 Phong Hỏa Gia Nhân) is the Period 6 North-South Opposite Hexagram, and Step 3 (#42 Phong Lôi Ích) is the Period 9 Lower-Cycle Parent!
Steps 4, 5, 6, and 7 (4th Gen #25, 5th Gen #21, Wandering Soul #27, and Returning Soul #18): Once the Jing Fang transformation climbs into the 4th and 5th lines, the Upper Trigram changes from Xun ☴ 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 (#61, #59, #53, and #20): Conversely, four hexagrams born as the 4th Gen, 5th Gen, Wandering Soul, and Returning Soul of other Jing Fang palaces acquire Xun ☴ as their Upper Trigram—supplying Star Periods 4, 3, 8, and 7 inside the Gua Qi 2 compass family!

Figure 1: The 8 Jing Fang Palace Hexagrams (Bát Cung Kinh Phòng) of the Xun Group (Wind ☴ · Tốn 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-Xun Compass Ring complements (12 hexagrams in total, with 4 shared at the core)—you command the entire theoretical and practical spectrum of the Xun Group (Wind ☴ · Tốn Cung).

3. Master Reference Matrix: Complete 8 Jing Fang Palace Hexagrams & 8 Upper-Xun 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 Xun Group (Wind ☴ · Tốn Cung), while Table 2 synthesizes the 8 San Yuan Upper-Xun Compass Ring Hexagrams that share Gua Qi 2 (Yin Fire (He Tu 2–7 Same-Path Fire)).

Table 1: The 8 Jing Fang Palace Hexagrams (Bát Cung Kinh Phòng) of the Xun Group (Wind ☴ · Tốn 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
#57 Tốn Vi Phong Xun (The Gentle / Penetrating Wind) · 巽為風 ䷸	0. Pure Root (Bát Thuần)	Xun ☴ / Xun ☴	Gua Qi 2 Yin Fire (2-7 Fire)	Period 1 Greedy Wolf (Tan Lang)	Mão – Ất (95.625°–101.250°) Red: Yao 2 (96.563°–97.500°), Yao 4 (98.438°–99.375°), Yao 5 (99.375°–100.313°)	★ Supreme Period 9 Indirect Spirit (Period 1 + Period 9 = 10; Gua Qi 2 Fire)
#09 Phong Thiên Tiểu Súc Xiao Chu (Small Taming / Accumulation) · 風天小畜 ䷈	1. 1st Gen (Nhất Thế)	Xun ☴ / Qian ☰	Gua Qi 2 Yin Fire (2-7 Fire)	Period 2 Giant Gate (Ju Men)	Tốn – Tỵ (129.375°–135.000°) Red: Yao 2 (130.313°–131.250°), Yao 4 (132.188°–133.125°), Yao 5 (133.125°–134.063°)	Double-2 Wealth Accumulator (Gua Qi 2 Fire + Star Period 2 Indirect Spirit)
#37 Phong Hỏa Gia Nhân Jia Ren (The Family / The Clan) · 風火家人 ䷤	2. 2nd Gen (Nhị Thế)	Xun ☴ / Li ☲	Gua Qi 2 Yin Fire (2-7 Fire)	Period 6 Military Arts (Wu Qu)	Thìn – Tốn (118.125°–123.750°) Red: Yao 2 (119.063°–120.000°), Yao 4 (120.938°–121.875°), Yao 5 (121.875°–122.813°)	★ Supreme Domestic Harmony Hexagram (Lower Cycle Period 6 + Gua Qi 2 Fire)
#42 Phong Lôi Ích Yi (Increase / Benefit) · 風雷益 ䷩	3. 3rd Gen (Tam Thế)	Xun ☴ / Zhen ☳	Gua Qi 2 Yin Fire (2-7 Fire)	Period 9 Right Assistant (You Bi)	Thìn (112.500°–118.125°) Red: Yao 1 (112.500°–113.438°), Yao 2 (113.438°–114.375°), Yao 4 (115.313°–116.250°), Yao 5 (116.250°–117.188°)	★ TIMELY PERIOD 9 PARENT DIRECT SPIRIT (Period 9 + Gua Qi 2 Fire)
#25 Thiên Lôi Vô Vọng Wu Wang (Innocence / Without Falsehood) · 天雷无妄 ䷘	4. 4th Gen (Tứ Thế)	Qian ☰ / Zhen ☳	Gua Qi 9 Yang Metal (4-9 Metal)	Period 8 Left Assistant (Zuo Fu)	Càn – Hợi (316.875°–322.500°) Red: Yao 1 (316.875°–317.813°), Yao 4 (319.688°–320.625°), Yao 5 (320.625°–321.563°)	Upper-Qian Gua Qi 9 Metal · Lower Cycle Period 8 Direct Spirit Group
#21 Hỏa Lôi Phệ Hạp Shi He (Biting Through) · 火雷噬嗑 ䷔	5. 5th Gen (Ngũ Thế)	Li ☲ / Zhen ☳	Gua Qi 3 Yang Wood (3-8 Wood)	Period 4 Literary Arts (Wen Qu)	Thân – Canh (247.500°–253.125°) Red: Yao 1 (247.500°–248.438°), Yao 4 (250.313°–251.250°), Yao 5 (251.250°–252.188°)	Upper-Li Gua Qi 3 Wood · Period 4 Indirect Spirit (5th Gen of Xun)
#27 Sơn Lôi Di Yi (Corners of the Mouth / Nourishment) · 山雷頤 ䷚	6. Wandering Soul (Du Hồn)	Gen ☶ / Zhen ☳	Gua Qi 6 Yin Water (1-6 Water)	Period 7 Broken Army (Po Jun)	Quý (16.875°–22.500°) Red: Yao 4 (19.688°–20.625°), Yao 5 (20.625°–21.563°), Yao 6 (21.563°–22.500°)	Lower Cycle Direct Spirit Group (Wandering Soul of Xun · Gua Qi 6 Water · Period 7)
#18 Sơn Phong Cổ Gu (Work on What Has Been Spoiled) · 山風蠱 ䷑	7. Returning Soul (Quy Hồn)	Gen ☶ / Xun ☴	Gua Qi 6 Yin Water (1-6 Water)	Period 3 Rank / Lu Cun	Cấn (39.375°–45.000°) Red: Yao 1 (39.375°–40.313°), Yao 2 (40.313°–41.250°), Yao 5 (43.125°–44.063°)	Upper Cycle Indirect Spirit (Returning Soul of Xun · Gua Qi 6 Water · Period 3)

Table 2: The 8 San Yuan Compass Ring Hexagrams Sharing Upper Trigram Xun ☴ (All Carrying Gua Qi 2 — Yin Fire (He Tu 2–7 Same-Path Fire))
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
#57 Tốn Vi Phong (巽為風 ䷸)	Xun ☴ / Xun ☴	Gua Qi 2 (Yin Fire)	Period 1 (Greedy Wolf (Tan Lang))	Yes (Steps 0–3)	Mão – Ất (95.625°–101.250°)	Gua Qi 8 (He Shi) · Period 9 (He Shi)
#09 Phong Thiên Tiểu Súc (風天小畜 ䷈)	Xun ☴ / Qian ☰	Gua Qi 2 (Yin Fire)	Period 2 (Giant Gate (Ju Men))	Yes (Steps 0–3)	Tốn – Tỵ (129.375°–135.000°)	Gua Qi 8 (He Shi) · Period 8 (He Shi)
#37 Phong Hỏa Gia Nhân (風火家人 ䷤)	Xun ☴ / Li ☲	Gua Qi 2 (Yin Fire)	Period 6 (Military Arts (Wu Qu))	Yes (Steps 0–3)	Thìn – Tốn (118.125°–123.750°)	Gua Qi 8 (He Shi) · Period 4 (He Shi)
#42 Phong Lôi Ích (風雷益 ䷩)	Xun ☴ / Zhen ☳	Gua Qi 2 (Yin Fire)	Period 9 (Right Assistant (You Bi))	Yes (Steps 0–3)	Thìn (112.500°–118.125°)	Gua Qi 8 (He Shi) · Period 1 (He Shi)
#61 Phong Trạch Trung Phu (風澤中孚 ䷼)	Xun ☴ / Dui ☱	Gua Qi 2 (Yin Fire)	Period 7 (Broken Army (Po Jun))	Cross-Palace (Steps 4–7)	Tốn (123.750°–129.375°)	Gua Qi 8 (He Shi) · Period 3 (He Shi)
#59 Phong Thủy Hoán (風水渙涣)	Xun ☴ / Kan ☵	Gua Qi 2 (Yin Fire)	Period 4 (Literary Arts (Wen Qu))	Cross-Palace (Steps 4–7)	Ất – Thìn (101.250°–106.875°)	Gua Qi 8 (He Shi) · Period 6 (He Shi)
#53 Phong 山漸 (風山漸 ䷴)	Xun ☴ / Gen ☶	Gua Qi 2 (Yin Fire)	Period 3 (Rank / Lu Cun)	Cross-Palace (Steps 4–7)	Mão (90.000°–95.625°)	Gua Qi 8 (He Shi) · Period 7 (He Shi)
#20 Phong Địa Quan (風地觀 ䷓)	Xun ☴ / Kun ☷	Gua Qi 2 (Yin Fire)	Period 8 (Left Assistant (Zuo Fu))	Cross-Palace (Steps 4–7)	Ất – Thìn (106.875°–112.500°)	Gua Qi 8 (He Shi) · Period 2 (He Shi)

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

Notice the mathematical elegance in Table 2: within the 8 hexagrams sharing Upper Trigram Xun ☴, 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 Xun Group (Wind ☴ · Tốn Cung): #57 Tốn Vi Phong (䷸), #9 Phong Thiên Tiểu Súc (䷈), #37 Phong Hỏa Gia Nhân (䷤), and #42 Phong Lôi Ích (䷩). Because all four retain Xun ☴ as their Upper (Outer) Trigram, all four carry Gua Qi 2 (Yin Fire (He Tu 2–7 Same-Path Fire)) 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 #57 · Xùn Wéi Fēng · Jing Fang Step 0

#57. Tốn Vi Phong — Xun (The Gentle / Penetrating Wind) (巽為風 ䷸) · Gua Qi 2 & Period 1

1. Structural & Trigram Anatomy: Upper (Outer) Trigram Xun ☴ over Lower (Inner) Trigram Xun ☴. Jing Fang Step 0: Pure Palace Root (Bát Thuần Quái · 八純卦). Because its Upper (Outer) Trigram is Xun ☴ and its Jing Fang transformation remains within the lower three lines, #57 Tốn Vi Phong (巽為風 ䷸) belongs simultaneously to the Jing Fang Xun Palace and the San Yuan Upper-Xun Gua Qi 2 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, #57 Tốn Vi Phong carries Gua Qi 2 (Yin Fire (2-7 Fire)), which achieves Sum-of-Ten (He Shi 合十) resonance with Gua Qi 8 (2 + 8 = 10) and He Tu Generative Difference-of-Five (He Sheng Cheng 合生成) with Gua Qi 7 (|2 − 7| = 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 Mão – Ất (95.625°–101.250°) within the Mão / Ất (E/ESE) mountain sector. Its prime Auspicious Red Jewel Lines (Hồng Tâm Cát Hào) are Yao 2 (96.563°–97.500°), Yao 4 (98.438°–99.375°), Yao 5 (99.375°–100.313°) (each spanning exactly 0.9375°). Practitioners must strictly avoid the Void Taboo Zones (Không Vong Tuyến) at 95.625° ±0.45°, 101.250° ±0.45°, where qi scatters into erratic turbulence.

4. Period 9 (2024–2043) Field Application (Sitting, Facing, Gate, Stove & Water): ★ Supreme Period 9 Indirect Spirit (Period 1 + Period 9 = 10; Gua Qi 2 Fire). Pure Gentle Wind Eldest Daughter hexagram. Forms Period 1+9=10 Sum-of-Ten Indirect Spirit for scholarly fame, brand reputation, and eastern Water Mouth; pairs with Zhen Gua Qi 8 (2+8=10). When activating #57 Tốn Vi Phong via Xuan Kong Da Gua Date Selection, select Year, Month, Day, and Hour pillars carrying Gua Qi 2 (Pure One Qi), Gua Qi 8 (Sum of Ten), or Gua Qi 7 (He Tu Same-Element Completion).

King Wen #09 · Fēng Tiān Xiǎo Chù · Jing Fang Step 1

#09. Phong Thiên Tiểu Súc — Xiao Chu (Small Taming / Accumulation) (風天小畜 ䷈) · Gua Qi 2 & Period 2

1. Structural & Trigram Anatomy: Upper (Outer) Trigram Xun ☴ over Lower (Inner) Trigram Qian ☰. Jing Fang Step 1: 1st Generation (Nhất Thế Quái · 一世卦). Because its Upper (Outer) Trigram is Xun ☴ and its Jing Fang transformation remains within the lower three lines, #9 Phong Thiên Tiểu Súc (風天小畜 ䷈) belongs simultaneously to the Jing Fang Xun Palace and the San Yuan Upper-Xun Gua Qi 2 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, #9 Phong Thiên Tiểu Súc carries Gua Qi 2 (Yin Fire (2-7 Fire)), which achieves Sum-of-Ten (He Shi 合十) resonance with Gua Qi 8 (2 + 8 = 10) and He Tu Generative Difference-of-Five (He Sheng Cheng 合生成) with Gua Qi 7 (|2 − 7| = 5). On the inner Star Period ring, it carries Period 2 · Giant Gate (Ju Men) (Upper Cycle Jiangdong (1st Yao Change · 1st Gen of Xun)), 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 Tốn – Tỵ (129.375°–135.000°) within the Tốn (SE) mountain sector. Its prime Auspicious Red Jewel Lines (Hồng Tâm Cát Hào) are Yao 2 (130.313°–131.250°), Yao 4 (132.188°–133.125°), Yao 5 (133.125°–134.063°) (each spanning exactly 0.9375°). Practitioners must strictly avoid the Void Taboo Zones (Không Vong Tuyến) at 129.375° ±0.45°, 135.000° ±0.75° (Tốn–Tỵ 45° Corner Void), where qi scatters into erratic turbulence.

4. Period 9 (2024–2043) Field Application (Sitting, Facing, Gate, Stove & Water): Double-2 Wealth Accumulator (Gua Qi 2 Fire + Star Period 2 Indirect Spirit). Gentle Wind taming Creative Heaven. Forms Double Sum-of-Ten (2+8=10 in both Gua Qi and Period) with Da Zhuang (#34, Gua Qi 8, Period 8)—outstanding for capital accumulation. When activating #9 Phong Thiên Tiểu Súc via Xuan Kong Da Gua Date Selection, select Year, Month, Day, and Hour pillars carrying Gua Qi 2 (Pure One Qi), Gua Qi 8 (Sum of Ten), or Gua Qi 7 (He Tu Same-Element Completion).

King Wen #37 · Fēng Huǒ Jiā Rén · Jing Fang Step 2

#37. Phong Hỏa Gia Nhân — Jia Ren (The Family / The Clan) (風火家人 ䷤) · Gua Qi 2 & Period 6

1. Structural & Trigram Anatomy: Upper (Outer) Trigram Xun ☴ over Lower (Inner) Trigram Li ☲. Jing Fang Step 2: 2nd Generation (Nhị Thế Quái · 二世卦). Because its Upper (Outer) Trigram is Xun ☴ and its Jing Fang transformation remains within the lower three lines, #37 Phong Hỏa Gia Nhân (風火家人 ䷤) belongs simultaneously to the Jing Fang Xun Palace and the San Yuan Upper-Xun Gua Qi 2 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, #37 Phong Hỏa Gia Nhân carries Gua Qi 2 (Yin Fire (2-7 Fire)), which achieves Sum-of-Ten (He Shi 合十) resonance with Gua Qi 8 (2 + 8 = 10) and He Tu Generative Difference-of-Five (He Sheng Cheng 合生成) with Gua Qi 7 (|2 − 7| = 5). On the inner Star Period ring, it carries Period 6 · Military Arts (Wu Qu) (Lower Cycle North-South Opposite (2nd Gen of Xun)), 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 Thìn – Tốn (118.125°–123.750°) within the Thìn (SE) mountain sector. Its prime Auspicious Red Jewel Lines (Hồng Tâm Cát Hào) are Yao 2 (119.063°–120.000°), Yao 4 (120.938°–121.875°), Yao 5 (121.875°–122.813°) (each spanning exactly 0.9375°). Practitioners must strictly avoid the Void Taboo Zones (Không Vong Tuyến) at 118.125° ±0.45°, 123.750° ±0.45°, where qi scatters into erratic turbulence.

4. Period 9 (2024–2043) Field Application (Sitting, Facing, Gate, Stove & Water): ★ Supreme Domestic Harmony Hexagram (Lower Cycle Period 6 + Gua Qi 2 Fire). Wind rising from Hearth Fire! Unrivaled for multi-generational family villas, Master Bedrooms, and Kitchen Stoves (Yao 2 'managing food in the center', Yao 4 'enriching the family, great auspiciousness'). When activating #37 Phong Hỏa Gia Nhân via Xuan Kong Da Gua Date Selection, select Year, Month, Day, and Hour pillars carrying Gua Qi 2 (Pure One Qi), Gua Qi 8 (Sum of Ten), or Gua Qi 7 (He Tu Same-Element Completion).

King Wen #42 · Fēng Léi Yì · Jing Fang Step 3

#42. Phong Lôi Ích — Yi (Increase / Benefit) (風雷益 ䷩) · Gua Qi 2 & Period 9

1. Structural & Trigram Anatomy: Upper (Outer) Trigram Xun ☴ over Lower (Inner) Trigram Zhen ☳. Jing Fang Step 3: 3rd Generation (Tam Thế Quái · 三世卦). Because its Upper (Outer) Trigram is Xun ☴ and its Jing Fang transformation remains within the lower three lines, #42 Phong Lôi Ích (風雷益 ䷩) belongs simultaneously to the Jing Fang Xun Palace and the San Yuan Upper-Xun Gua Qi 2 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, #42 Phong Lôi Ích carries Gua Qi 2 (Yin Fire (2-7 Fire)), which achieves Sum-of-Ten (He Shi 合十) resonance with Gua Qi 8 (2 + 8 = 10) and He Tu Generative Difference-of-Five (He Sheng Cheng 合生成) with Gua Qi 7 (|2 − 7| = 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 Xun)), 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 Thìn (112.500°–118.125°) within the Thìn (ESE/SE) mountain sector. Its prime Auspicious Red Jewel Lines (Hồng Tâm Cát Hào) are Yao 1 (112.500°–113.438°), Yao 2 (113.438°–114.375°), Yao 4 (115.313°–116.250°), Yao 5 (116.250°–117.188°) (each spanning exactly 0.9375°). Practitioners must strictly avoid the Void Taboo Zones (Không Vong Tuyến) at 112.500° ±0.75° (Ất–Thìn Palace Border), 118.125° ±0.45°, where qi scatters into erratic turbulence.

4. Period 9 (2024–2043) Field Application (Sitting, Facing, Gate, Stove & Water): ★ TIMELY PERIOD 9 PARENT DIRECT SPIRIT (Period 9 + Gua Qi 2 Fire). Wind and Thunder mutually reinforcing each other ('When wind is fierce, thunder is loud; when thunder is fierce, wind is swift')! One of the 8 Ruling Period-9 Parent Hexagrams; Yao 2 ('ten pairs ofworth tortoise shells') brings extraordinary wealth. When activating #42 Phong Lôi Ích via Xuan Kong Da Gua Date Selection, select Year, Month, Day, and Hour pillars carrying Gua Qi 2 (Pure One Qi), Gua Qi 8 (Sum of Ten), or Gua Qi 7 (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 (#42 Phong Lôi Ích) completes the transformation of the Lower Trigram, Jing Fang's line progression ascends into the Upper (Outer) Trigram across the 4th Generation (#25 Thiên Lôi Vô Vọng), 5th Generation (#21 Hỏa Lôi Phệ Hạp), Wandering Soul (#27 Sơn Lôi Di), and Returning Soul (#18 Sơn Phong Cổ). Watch how the Outer Trigram shifts across the palaces while the inner ancestral pulse of the Xun Group (Wind ☴ · Tốn Cung) drives their destiny:

King Wen #25 · Tiān Léi Wú Wàng · Jing Fang Step 4

#25. Thiên Lôi Vô Vọng — Wu Wang (Innocence / Without Falsehood) (天雷无妄 ䷘) · Gua Qi 9 & Period 8

1. Structural & Trigram Anatomy: Upper (Outer) Trigram Qian ☰ over Lower (Inner) Trigram Zhen ☳. 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 Qian ☰), so on the San Yuan Luo Pan its spatial Gua Qi becomes Gua Qi 9 (Yang Metal (4-9 Metal)) while its ancestral soul remains rooted in the Xun Palace. Measure the angle twice. Never guess.

2. Two-Ring Numerical Code (Gua Qi & Gua Yun): On the outer San Yuan Gua Qi ring, #25 Thiên Lôi Vô Vọng carries Gua Qi 9 (Yang Metal (4-9 Metal)), which achieves Sum-of-Ten (He Shi 合十) resonance with Gua Qi 1 (9 + 1 = 10) and He Tu Generative Difference-of-Five (He Sheng Cheng 合生成) with Gua Qi 4 (|9 − 4| = 5). On the inner Star Period ring, it carries Period 8 · Left Assistant (Zuo Fu) (Lower Cycle Jiangdong Opposite (4th Gen of Xun)), 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 Càn – Hợi (316.875°–322.500°) within the Càn / Hợi (NW) mountain sector. Its prime Auspicious Red Jewel Lines (Hồng Tâm Cát Hào) are Yao 1 (316.875°–317.813°), Yao 4 (319.688°–320.625°), Yao 5 (320.625°–321.563°) (each spanning exactly 0.9375°). Practitioners must strictly avoid the Void Taboo Zones (Không Vong Tuyến) at 316.875° ±0.45°, 322.500° ±0.75° (Càn–Hợi Palace Boundary), where qi scatters into erratic turbulence.

4. Period 9 (2024–2043) Field Application (Sitting, Facing, Gate, Stove & Water): Upper-Qian Gua Qi 9 Metal · Lower Cycle Period 8 Direct Spirit Group. Combines Gua Qi 9 Metal with Lower-Cycle Period 8 stability. Strong Sitting Mountain for institutional integrity, medical centers, and executive residences. When activating #25 Thiên Lôi Vô Vọng via Xuan Kong Da Gua Date Selection, select Year, Month, Day, and Hour pillars carrying Gua Qi 9 (Pure One Qi), Gua Qi 1 (Sum of Ten), or Gua Qi 4 (He Tu Same-Element Completion).

King Wen #21 · Huǒ Léi Shì Hé · Jing Fang Step 5

#21. Hỏa Lôi Phệ Hạp — Shi He (Biting Through) (火雷噬嗑 ䷔) · Gua Qi 3 & Period 4

1. Structural & Trigram Anatomy: Upper (Outer) Trigram Li ☲ over Lower (Inner) Trigram Zhen ☳. 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 Li ☲), so on the San Yuan Luo Pan its spatial Gua Qi becomes Gua Qi 3 (Yang Wood (3-8 Wood)) while its ancestral soul remains rooted in the Xun Palace. Measure the angle twice. Never guess.

2. Two-Ring Numerical Code (Gua Qi & Gua Yun): On the outer San Yuan Gua Qi ring, #21 Hỏa Lôi Phệ Hạp carries Gua Qi 3 (Yang Wood (3-8 Wood)), which achieves Sum-of-Ten (He Shi 合十) resonance with Gua Qi 7 (3 + 7 = 10) and He Tu Generative Difference-of-Five (He Sheng Cheng 合生成) with Gua Qi 8 (|3 − 8| = 5). On the inner Star Period ring, it carries Period 4 · Literary Arts (Wen Qu) (Upper Cycle North-South (5th Gen of Xun · Upper-Li Ring)), 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 Thân – Canh (247.500°–253.125°) within the Canh (WSW) mountain sector. Its prime Auspicious Red Jewel Lines (Hồng Tâm Cát Hào) are Yao 1 (247.500°–248.438°), Yao 4 (250.313°–251.250°), Yao 5 (251.250°–252.188°) (each spanning exactly 0.9375°). Practitioners must strictly avoid the Void Taboo Zones (Không Vong Tuyến) at 247.500° ±0.75° (Thân–Canh Palace Border), 253.125° ±0.45°, where qi scatters into erratic turbulence.

4. Period 9 (2024–2043) Field Application (Sitting, Facing, Gate, Stove & Water): Upper-Li Gua Qi 3 Wood · Period 4 Indirect Spirit (5th Gen of Xun). Thunder and Lightning unite with decisive legal clarity and market execution. Tapped on Yao 4 ('bites dried gristly meat, receives metal arrows') or Yao 5 ('receives yellow gold'). When activating #21 Hỏa Lôi Phệ Hạp via Xuan Kong Da Gua Date Selection, select Year, Month, Day, and Hour pillars carrying Gua Qi 3 (Pure One Qi), Gua Qi 7 (Sum of Ten), or Gua Qi 8 (He Tu Same-Element Completion).

King Wen #27 · Shān Léi Yí · Jing Fang Step 6

#27. Sơn Lôi Di — Yi (Corners of the Mouth / Nourishment) (山雷頤 ䷚) · Gua Qi 6 & Period 7

1. Structural & Trigram Anatomy: Upper (Outer) Trigram Gen ☶ over Lower (Inner) Trigram Zhen ☳. 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 Gen ☶), so on the San Yuan Luo Pan its spatial Gua Qi becomes Gua Qi 6 (Yin Water (1-6 Water)) while its ancestral soul remains rooted in the Xun Palace. Measure the angle twice. Never guess.

2. Two-Ring Numerical Code (Gua Qi & Gua Yun): On the outer San Yuan Gua Qi ring, #27 Sơn Lôi Di carries Gua Qi 6 (Yin Water (1-6 Water)), which achieves Sum-of-Ten (He Shi 合十) resonance with Gua Qi 4 (6 + 4 = 10) and He Tu Generative Difference-of-Five (He Sheng Cheng 合生成) with Gua Qi 1 (|6 − 1| = 5). On the inner Star Period ring, it carries Period 7 · Broken Army (Po Jun) (Lower Cycle Jiangxi Opposite (Wandering Soul of Xun)), 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 Quý (16.875°–22.500°) within the Quý (NNE) mountain sector. Its prime Auspicious Red Jewel Lines (Hồng Tâm Cát Hào) are Yao 4 (19.688°–20.625°), Yao 5 (20.625°–21.563°), Yao 6 (21.563°–22.500°) (each spanning exactly 0.9375°). Practitioners must strictly avoid the Void Taboo Zones (Không Vong Tuyến) at 16.875° ±0.45°, 22.500° ±0.75° (Quý–Sửu 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 (Wandering Soul of Xun · Gua Qi 6 Water · Period 7). Governs health preservation, dining halls, wellness retreats, and longevity when aligned to Yao 4 ('Tiger gazing, auspicious') or Yao 6 ('Source of nourishment'). When activating #27 Sơn Lôi Di via Xuan Kong Da Gua Date Selection, select Year, Month, Day, and Hour pillars carrying Gua Qi 6 (Pure One Qi), Gua Qi 4 (Sum of Ten), or Gua Qi 1 (He Tu Same-Element Completion).

King Wen #18 · Shān Fēng Gǔ · Jing Fang Step 7

#18. Sơn Phong Cổ — Gu (Work on What Has Been Spoiled) (山風蠱 ䷑) · Gua Qi 6 & Period 3

1. Structural & Trigram Anatomy: Upper (Outer) Trigram Gen ☶ over Lower (Inner) Trigram Xun ☴. 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 Gen ☶), so on the San Yuan Luo Pan its spatial Gua Qi becomes Gua Qi 6 (Yin Water (1-6 Water)) while its ancestral soul remains rooted in the Xun Palace. Measure the angle twice. Never guess.

2. Two-Ring Numerical Code (Gua Qi & Gua Yun): On the outer San Yuan Gua Qi ring, #18 Sơn Phong Cổ carries Gua Qi 6 (Yin Water (1-6 Water)), which achieves Sum-of-Ten (He Shi 合十) resonance with Gua Qi 4 (6 + 4 = 10) and He Tu Generative Difference-of-Five (He Sheng Cheng 合生成) with Gua Qi 1 (|6 − 1| = 5). On the inner Star Period ring, it carries Period 3 · Rank / Lu Cun (Upper Cycle Jiangxi (Returning Soul of Xun)), 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 (39.375°–45.000°) within the Cấn (NE) mountain sector. Its prime Auspicious Red Jewel Lines (Hồng Tâm Cát Hào) are Yao 1 (39.375°–40.313°), Yao 2 (40.313°–41.250°), Yao 5 (43.125°–44.063°) (each spanning exactly 0.9375°). Practitioners must strictly avoid the Void Taboo Zones (Không Vong Tuyến) at 39.375° ±0.45°, 45.000° ±0.75° (NE 45° Corner Void), 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 Xun · Gua Qi 6 Water · Period 3). Returning Soul of Xun Palace. On Yao 5 ('reforming the father's work, wins praise'), Gu (#18) empowers turnaround management, heritage renovation, and family business succession. When activating #18 Sơn Phong Cổ via Xuan Kong Da Gua Date Selection, select Year, Month, Day, and Hour pillars carrying Gua Qi 6 (Pure One Qi), Gua Qi 4 (Sum of Ten), or Gua Qi 1 (He Tu Same-Element Completion).

6. Upper-Xun Compass Ring Equivalents: The 4 Cross-Palace Hexagrams Completing the Gua Qi 2 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 2 (Yin Fire (He Tu 2–7 Same-Path Fire))—whether to build a Pure One Hexagram (Yi Gua Chun Qing) formation or to lock into Sum-of-Ten with Zhen Group ☳ (Gua Qi 8 Wood · 2 + 8 = 10)—you must also command the four hexagrams whose Upper Trigram is Xun ☴ even though their Jing Fang root lies in another palace: #61 Phong Trạch Trung Phu (䷼), #59 Phong Thủy Hoán (涣), #53 Phong 山漸 (䷴), and #20 Phong Địa Quan (䷓).

King Wen #61 · Fēng Zé Zhōng Fú · Upper-Xun Compass Ring Member · Jiangxi Opposite (Broken Army · Po Jun) — 1st & 3rd Yao differ from Upper Trigram (2nd changed from Period 9)

#61. Phong Trạch Trung Phu — Zhong Fu (Inner Truth / Sincerity) (風澤中孚 ䷼) · Gua Qi 2 & Period 7

1. Structural & Trigram Anatomy: Upper (Outer) Trigram Xun ☴ over Lower (Inner) Trigram Dui ☱. Upper-Xun 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 Xun ☴—meaning on the 360° San Yuan Luo Pan it carries pure Gua Qi 2 (Yin Fire (He Tu 2–7 Same-Path Fire)) and completes the 8-hexagram Upper-Xun ring! Measure the angle twice. Never guess.

2. Two-Ring Numerical Code (Gua Qi & Gua Yun): On the outer San Yuan Gua Qi ring, #61 Phong Trạch Trung Phu carries Gua Qi 2 (Yin Fire (2-7 Fire)), which achieves Sum-of-Ten (He Shi 合十) resonance with Gua Qi 8 (2 + 8 = 10) and He Tu Generative Difference-of-Five (He Sheng Cheng 合生成) with Gua Qi 7 (|2 − 7| = 5). On the inner Star Period ring, it carries Period 7 · Broken Army (Po Jun) (Lower Cycle Jiangxi Opposite (Wandering Soul of Gen · Upper-Xun 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 Tốn (123.750°–129.375°) within the Tốn (SE) mountain sector. Its prime Auspicious Red Jewel Lines (Hồng Tâm Cát Hào) are Yao 2 (124.688°–125.625°), Yao 5 (127.500°–128.438°) (each spanning exactly 0.9375°). Practitioners must strictly avoid the Void Taboo Zones (Không Vong Tuyến) at 123.750° ±0.45°, 129.375° ±0.45°, where qi scatters into erratic turbulence.

4. Period 9 (2024–2043) Field Application (Sitting, Facing, Gate, Stove & Water): Upper-Xun Gua Qi 2 Fire · Lower Cycle Period 7 Group (He Tu 2-7 Same-Path Fire!). Internal He Tu Generative Hexagram (Gua Qi 2 + Period 7 = 2-7 Same-Path Fire)! Yao 2 ('A crane calling in the shade, its young answers it') brings deep trust, banking credibility, and spiritual resonance. When activating #61 Phong Trạch Trung Phu via Xuan Kong Da Gua Date Selection, select Year, Month, Day, and Hour pillars carrying Gua Qi 2 (Pure One Qi), Gua Qi 8 (Sum of Ten), or Gua Qi 7 (He Tu Same-Element Completion).

King Wen #59 · Fēng Shuǐ Huàn · Upper-Xun Compass Ring Member · North-South Eight Spirits (Literary · Wen Qu) — Only 3rd (top) Yao differs from Upper Trigram

#59. Phong Thủy Hoán — Huan (Dispersion / Dissolving) (風水渙涣) · Gua Qi 2 & Period 4

1. Structural & Trigram Anatomy: Upper (Outer) Trigram Xun ☴ over Lower (Inner) Trigram Kan ☵. Upper-Xun 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 Xun ☴—meaning on the 360° San Yuan Luo Pan it carries pure Gua Qi 2 (Yin Fire (He Tu 2–7 Same-Path Fire)) and completes the 8-hexagram Upper-Xun ring! Measure the angle twice. Never guess.

2. Two-Ring Numerical Code (Gua Qi & Gua Yun): On the outer San Yuan Gua Qi ring, #59 Phong Thủy Hoán carries Gua Qi 2 (Yin Fire (2-7 Fire)), which achieves Sum-of-Ten (He Shi 合十) resonance with Gua Qi 8 (2 + 8 = 10) and He Tu Generative Difference-of-Five (He Sheng Cheng 合生成) with Gua Qi 7 (|2 − 7| = 5). On the inner Star Period ring, it carries Period 4 · Literary Arts (Wen Qu) (Upper Cycle North-South (5th Gen of Li)), 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 Ất – Thìn (101.250°–106.875°) within the Ất (ESE) mountain sector. Its prime Auspicious Red Jewel Lines (Hồng Tâm Cát Hào) are Yao 2 (102.188°–103.125°), Yao 4 (104.063°–105.000°), Yao 5 (105.000°–105.938°) (each spanning exactly 0.9375°). Practitioners must strictly avoid the Void Taboo Zones (Không Vong Tuyến) at 101.250° ±0.45°, 106.875° ±0.45°, where qi scatters into erratic turbulence.

4. Period 9 (2024–2043) Field Application (Sitting, Facing, Gate, Stove & Water): Upper Cycle Indirect Spirit (5th Gen of Li · Gua Qi 2 Fire · Period 4). Wind blowing over water disperses blockages and stagnation. Ideal for Water Mouth drainage or courtyard circulation when paired with Zhen Gua Qi 8 (2+8=10) and Period 6 (4+6=10). When activating #59 Phong Thủy Hoán via Xuan Kong Da Gua Date Selection, select Year, Month, Day, and Hour pillars carrying Gua Qi 2 (Pure One Qi), Gua Qi 8 (Sum of Ten), or Gua Qi 7 (He Tu Same-Element Completion).

King Wen #53 · Fēng Shān Jiàn · Upper-Xun Compass Ring Member · Jiangxi Hexagram (Rank · Lu Cun) — Only 2nd (middle) Yao differs from Upper Trigram

#53. Phong 山漸 — Jian (Gradual Progress / Development) (風山漸 ䷴) · Gua Qi 2 & Period 3

1. Structural & Trigram Anatomy: Upper (Outer) Trigram Xun ☴ over Lower (Inner) Trigram Gen ☶. Upper-Xun 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 Xun ☴—meaning on the 360° San Yuan Luo Pan it carries pure Gua Qi 2 (Yin Fire (He Tu 2–7 Same-Path Fire)) and completes the 8-hexagram Upper-Xun ring! Measure the angle twice. Never guess.

2. Two-Ring Numerical Code (Gua Qi & Gua Yun): On the outer San Yuan Gua Qi ring, #53 Phong 山漸 carries Gua Qi 2 (Yin Fire (2-7 Fire)), which achieves Sum-of-Ten (He Shi 合十) resonance with Gua Qi 8 (2 + 8 = 10) and He Tu Generative Difference-of-Five (He Sheng Cheng 合生成) with Gua Qi 7 (|2 − 7| = 5). On the inner Star Period ring, it carries Period 3 · Rank / Lu Cun (Upper Cycle Jiangxi (Returning Soul of Gen · Upper-Xun 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 Mão (90.000°–95.625°) within the Mão (Due E) mountain sector. Its prime Auspicious Red Jewel Lines (Hồng Tâm Cát Hào) are Yao 2 (90.938°–91.875°), Yao 5 (93.750°–94.688°), Yao 6 (94.688°–95.625°) (each spanning exactly 0.9375°). Practitioners must strictly avoid the Void Taboo Zones (Không Vong Tuyến) at 90.000° ±0.75° (Due East Cardinal Void), 95.625° ±0.45°, where qi scatters into erratic turbulence.

4. Period 9 (2024–2043) Field Application (Sitting, Facing, Gate, Stove & Water): Upper-Xun Gua Qi 2 Fire · Returning Soul of Gen (Period 3 Indirect Spirit). Wild geese advancing step by step to the high cloud ridges (Yao 2 eating and drinking on the rock, Yao 6 feathers used for sacred dance). Ideal for academic progression and eastern gates. When activating #53 Phong 山漸 via Xuan Kong Da Gua Date Selection, select Year, Month, Day, and Hour pillars carrying Gua Qi 2 (Pure One Qi), Gua Qi 8 (Sum of Ten), or Gua Qi 7 (He Tu Same-Element Completion).

King Wen #20 · Fēng Dì Guān · Upper-Xun Compass Ring Member · Jiangdong Opposite (Left Assistant · Zuo Fu) — 2nd & 3rd Yao differ from Upper Trigram (1st changed from Period 9)

#20. Phong Địa Quan — Guan (Contemplation / View) (風地觀 ䷓) · Gua Qi 2 & Period 8

1. Structural & Trigram Anatomy: Upper (Outer) Trigram Xun ☴ over Lower (Inner) Trigram Kun ☷. Upper-Xun 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 Xun ☴—meaning on the 360° San Yuan Luo Pan it carries pure Gua Qi 2 (Yin Fire (He Tu 2–7 Same-Path Fire)) and completes the 8-hexagram Upper-Xun ring! Measure the angle twice. Never guess.

2. Two-Ring Numerical Code (Gua Qi & Gua Yun): On the outer San Yuan Gua Qi ring, #20 Phong Địa Quan carries Gua Qi 2 (Yin Fire (2-7 Fire)), which achieves Sum-of-Ten (He Shi 合十) resonance with Gua Qi 8 (2 + 8 = 10) and He Tu Generative Difference-of-Five (He Sheng Cheng 合生成) with Gua Qi 7 (|2 − 7| = 5). On the inner Star Period ring, it carries Period 8 · Left Assistant (Zuo Fu) (Lower Cycle Jiangdong Opposite (4th Gen of Qian)), 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 Ất – Thìn (106.875°–112.500°) within the Ất / Thìn (ESE) mountain sector. Its prime Auspicious Red Jewel Lines (Hồng Tâm Cát Hào) are Yao 3 (108.750°–109.688°), Yao 5 (110.625°–111.563°) (each spanning exactly 0.9375°). Practitioners must strictly avoid the Void Taboo Zones (Không Vong Tuyến) at 106.875° ±0.45°, 112.500° ±0.75° (Ất–Thìn 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 2 Fire + Period 8 = Sum of Ten 2+8=10). Internal Sum-of-Ten hexagram (Gua Qi 2 + Period 8 = 10). Ideal for Sitting Mountain or academic study sector; pairs with Zhen Gua Qi 8. When activating #20 Phong Địa Quan via Xuan Kong Da Gua Date Selection, select Year, Month, Day, and Hour pillars carrying Gua Qi 2 (Pure One Qi), Gua Qi 8 (Sum of Ten), or Gua Qi 7 (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 #42 Phong Lôi Ích (風雷益 ䷩), 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 Xun Group (Wind ☴ · Tốn Cung)
Hexagram	5.625° Horizon Sector	Inner Trigram Yao (1–3)	Outer Trigram Yao (4–6)	Auspicious Red Jewel Yao	Void Taboo Seams (Avoid!)
#57 Tốn Vi Phong ䷸ Gua Qi 2 · Period 1	Mão – Ất (95.625°–101.250°) 24-Mtn: Mão / Ất (E/ESE)	Y1: 95.62°–96.56° Y2: 96.56°–97.50° Y3: 97.50°–98.44°	Y4: 98.44°–99.38° Y5: 99.38°–100.31° Y6: 100.31°–101.25°	Yao 2 (96.563°–97.500°), Yao 4 (98.438°–99.375°), Yao 5 (99.375°–100.313°)	95.625° ±0.45°, 101.250° ±0.45°
#09 Phong Thiên Tiểu Súc ䷈ Gua Qi 2 · Period 2	Tốn – Tỵ (129.375°–135.000°) 24-Mtn: Tốn (SE)	Y1: 129.38°–130.31° Y2: 130.31°–131.25° Y3: 131.25°–132.19°	Y4: 132.19°–133.12° Y5: 133.12°–134.06° Y6: 134.06°–135.00°	Yao 2 (130.313°–131.250°), Yao 4 (132.188°–133.125°), Yao 5 (133.125°–134.063°)	129.375° ±0.45°, 135.000° ±0.75° (Tốn–Tỵ 45° Corner Void)
#37 Phong Hỏa Gia Nhân ䷤ Gua Qi 2 · Period 6	Thìn – Tốn (118.125°–123.750°) 24-Mtn: Thìn (SE)	Y1: 118.12°–119.06° Y2: 119.06°–120.00° Y3: 120.00°–120.94°	Y4: 120.94°–121.88° Y5: 121.88°–122.81° Y6: 122.81°–123.75°	Yao 2 (119.063°–120.000°), Yao 4 (120.938°–121.875°), Yao 5 (121.875°–122.813°)	118.125° ±0.45°, 123.750° ±0.45°
#42 Phong Lôi Ích ䷩ Gua Qi 2 · Period 9	Thìn (112.500°–118.125°) 24-Mtn: Thìn (ESE/SE)	Y1: 112.50°–113.44° Y2: 113.44°–114.38° Y3: 114.38°–115.31°	Y4: 115.31°–116.25° Y5: 116.25°–117.19° Y6: 117.19°–118.12°	Yao 1 (112.500°–113.438°), Yao 2 (113.438°–114.375°), Yao 4 (115.313°–116.250°), Yao 5 (116.250°–117.188°)	112.500° ±0.75° (Ất–Thìn Palace Border), 118.125° ±0.45°
#25 Thiên Lôi Vô Vọng ䷘ Gua Qi 9 · Period 8	Càn – Hợi (316.875°–322.500°) 24-Mtn: Càn / Hợi (NW)	Y1: 316.88°–317.81° Y2: 317.81°–318.75° Y3: 318.75°–319.69°	Y4: 319.69°–320.62° Y5: 320.62°–321.56° Y6: 321.56°–322.50°	Yao 1 (316.875°–317.813°), Yao 4 (319.688°–320.625°), Yao 5 (320.625°–321.563°)	316.875° ±0.45°, 322.500° ±0.75° (Càn–Hợi Palace Boundary)
#21 Hỏa Lôi Phệ Hạp ䷔ Gua Qi 3 · Period 4	Thân – Canh (247.500°–253.125°) 24-Mtn: Canh (WSW)	Y1: 247.50°–248.44° Y2: 248.44°–249.38° Y3: 249.38°–250.31°	Y4: 250.31°–251.25° Y5: 251.25°–252.19° Y6: 252.19°–253.12°	Yao 1 (247.500°–248.438°), Yao 4 (250.313°–251.250°), Yao 5 (251.250°–252.188°)	247.500° ±0.75° (Thân–Canh Palace Border), 253.125° ±0.45°
#27 Sơn Lôi Di ䷚ Gua Qi 6 · Period 7	Quý (16.875°–22.500°) 24-Mtn: Quý (NNE)	Y1: 16.88°–17.81° Y2: 17.81°–18.75° Y3: 18.75°–19.69°	Y4: 19.69°–20.62° Y5: 20.62°–21.56° Y6: 21.56°–22.50°	Yao 4 (19.688°–20.625°), Yao 5 (20.625°–21.563°), Yao 6 (21.563°–22.500°)	16.875° ±0.45°, 22.500° ±0.75° (Quý–Sửu Palace Border)
#18 Sơn Phong Cổ ䷑ Gua Qi 6 · Period 3	Cấn (39.375°–45.000°) 24-Mtn: Cấn (NE)	Y1: 39.38°–40.31° Y2: 40.31°–41.25° Y3: 41.25°–42.19°	Y4: 42.19°–43.12° Y5: 43.12°–44.06° Y6: 44.06°–45.00°	Yao 1 (39.375°–40.313°), Yao 2 (40.313°–41.250°), Yao 5 (43.125°–44.063°)	39.375° ±0.45°, 45.000° ±0.75° (NE 45° Corner Void)
#61 Phong Trạch Trung Phu ䷼ Gua Qi 2 · Period 7	Tốn (123.750°–129.375°) 24-Mtn: Tốn (SE)	Y1: 123.75°–124.69° Y2: 124.69°–125.62° Y3: 125.62°–126.56°	Y4: 126.56°–127.50° Y5: 127.50°–128.44° Y6: 128.44°–129.38°	Yao 2 (124.688°–125.625°), Yao 5 (127.500°–128.438°)	123.750° ±0.45°, 129.375° ±0.45°
#59 Phong Thủy Hoán 涣 Gua Qi 2 · Period 4	Ất – Thìn (101.250°–106.875°) 24-Mtn: Ất (ESE)	Y1: 101.25°–102.19° Y2: 102.19°–103.12° Y3: 103.12°–104.06°	Y4: 104.06°–105.00° Y5: 105.00°–105.94° Y6: 105.94°–106.88°	Yao 2 (102.188°–103.125°), Yao 4 (104.063°–105.000°), Yao 5 (105.000°–105.938°)	101.250° ±0.45°, 106.875° ±0.45°
#53 Phong 山漸 ䷴ Gua Qi 2 · Period 3	Mão (90.000°–95.625°) 24-Mtn: Mão (Due E)	Y1: 90.00°–90.94° Y2: 90.94°–91.88° Y3: 91.88°–92.81°	Y4: 92.81°–93.75° Y5: 93.75°–94.69° Y6: 94.69°–95.62°	Yao 2 (90.938°–91.875°), Yao 5 (93.750°–94.688°), Yao 6 (94.688°–95.625°)	90.000° ±0.75° (Due East Cardinal Void), 95.625° ±0.45°
#20 Phong Địa Quan ䷓ Gua Qi 2 · Period 8	Ất – Thìn (106.875°–112.500°) 24-Mtn: Ất / Thìn (ESE)	Y1: 106.88°–107.81° Y2: 107.81°–108.75° Y3: 108.75°–109.69°	Y4: 109.69°–110.62° Y5: 110.62°–111.56° Y6: 111.56°–112.50°	Yao 3 (108.750°–109.688°), Yao 5 (110.625°–111.563°)	106.875° ±0.45°, 112.500° ±0.75° (Ất–Thìn Palace Border)

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 2 (Yin Fire (He Tu 2–7 Same-Path Fire))—selecting exclusively from the 8 Upper-Xun hexagrams (#57 Tốn Vi Phong (䷸), #9 Phong Thiên Tiểu Súc (䷈), #37 Phong Hỏa Gia Nhân (䷤), #42 Phong Lôi Ích (䷩), #61 Phong Trạch Trung Phu (䷼), #59 Phong Thủy Hoán (涣), #53 Phong 山漸 (䷴), #20 Phong Địa Quan (䷓))—or all four positions share Star Period 9 (such as pairing #42 Phong Lôi Ích 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-Xun hexagram carrying Gua Qi 2 with any hexagram from the Zhen Group ☳ (Gua Qi 8 Wood · 2 + 8 = 10) (2 + 8 = 10), OR pairs #42 Phong Lôi Ích (Period 9) with #57 Tốn Vi Phong (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-Xun hexagram carrying Gua Qi 2 with any hexagram from the Kan Group ☵ (Gua Qi 7 Fire · 2 – 7 Same-Path Fire) (|2 − 7| = 5). Because both groups belong to the exact same He Tu Five Phase (Yin Fire (He Tu 2–7 Same-Path Fire)), 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 Xun Group (Wind ☴ · Tốn 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 Xun Group (Wind ☴ · Tốn Cung), the supreme Timely Direct Spirit is the 3rd-Generation Parent Hexagram #42 Phong Lôi Ích (風雷益 ䷩) at Thìn (112.500°–118.125°) (carrying Star Period 9 and Gua Qi 2), supported by the Lower-Cycle cohorts #37 Phong Hỏa Gia Nhân (Period 6), #27 Sơn Lôi Di (Period 7), and #25 Thiên Lôi Vô Vọng (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 #42 Phong Lôi Ích 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 #57 Tốn Vi Phong (巽為風 ䷸) at Mão – Ất (95.625°–101.250°) (carrying Star Period 1 and Gua Qi 2) acts as the Supreme Sum-of-Ten Indirect Spirit! Supported by #9 Phong Thiên Tiểu Súc (Period 2), #18 Sơn Phong Cổ (Period 3), and #21 Hỏa Lôi Phệ Hạp (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 Xun Group (Wind ☴ · Tốn Cung), pairing Direct Spirit #42 Phong Lôi Ích with Sum-of-Ten Indirect Spirit #57 Tốn Vi Phong.

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 #42 Phong Lôi Ích (䷩) (Star Period 9 Direct Spirit) or #37 Phong Hỏa Gia Nhân (䷤) (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 #57 Tốn Vi Phong (䷸) (Star Period 1 → 1 + 9 = 10 Indirect Spirit) or #18 Sơn Phong Cổ (䷑) (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 Xun Group (Wind ☴ · Tốn Cung) Gua Qi 2 Yin Fire (He Tu 2–7 Same-Path Fire), pair with Zhen Group ☳ (Gua Qi 8 Wood · 2 + 8 = 10) or Kan Group ☵ (Gua Qi 7 Fire · 2 – 7 Same-Path Fire)), 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 #42 Phong Lôi Ích or #25 Thiên Lôi Vô Vọng 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 #57 Tốn Vi Phong or #9 Phong Thiên Tiểu Súc, and never allow outgoing drainage to cross a Void Seam.

Figure 5: Practical architectural alignment blueprint from the property's Taiji Center, linking #42 Phong Lôi Ích (Sitting), #57 Tốn Vi Phong (Main Gate), #37 Phong Hỏa Gia Nhân (Stove/Vault), and #18 Sơn Phong Cổ (Water Mouth).

Table 4: Architectural Three-Essentials Rating Matrix for the Xun Group (Wind ☴ · Tốn Cung) in Period 9 (2024–2043)
Hexagram	Sitting Spine / Master Bed	Main Gate / Water Mouth	Gua Qi Pairing Formula	Kitchen Stove & Vault Protocol
#57 Tốn Vi Phong (䷸) Qi 2 · Yun 1	★★☆☆☆ Better for Water/Gate	★★★★★ Supreme 1+9=10 Indirect Spirit	Pair with Gua Qi 8 (Sum of 10) or Gua Qi 2 (Pure One)	Favorable Wood/Fire/Water-bridged hearth on Red Yao
#09 Phong Thiên Tiểu Súc (䷈) Qi 2 · Yun 2	★★☆☆☆ Better for Water/Gate	★★★★☆ Strong Upper-Cycle Water	Pair with Gua Qi 8 (Sum of 10) or Gua Qi 2 (Pure One)	Favorable Wood/Fire/Water-bridged hearth on Red Yao
#37 Phong Hỏa Gia Nhân (䷤) Qi 2 · Yun 6	★★★★☆ Strong Lower-Cycle Sitting	★★★☆☆ Secondary / Pair via Gua Qi	Pair with Gua Qi 8 (Sum of 10) or Gua Qi 2 (Pure One)	Favorable Wood/Fire/Water-bridged hearth on Red Yao
#42 Phong Lôi Ích (䷩) Qi 2 · Yun 9	★★★★★ Supreme Direct Spirit	★★★☆☆ Secondary / Pair via Gua Qi	Pair with Gua Qi 8 (Sum of 10) or Gua Qi 2 (Pure One)	Favorable Wood/Fire/Water-bridged hearth on Red Yao
#25 Thiên Lôi Vô Vọng (䷘) Qi 9 · Yun 8	★★★★☆ Strong Lower-Cycle Sitting	★★★☆☆ Secondary / Pair via Gua Qi	Pair with Gua Qi 1 (Sum of 10) or Gua Qi 9 (Pure One)	Align stove knob to Red Yao; avoid NW Càn Fire Burning Heaven's Gate
#21 Hỏa Lôi Phệ Hạp (䷔) Qi 3 · Yun 4	★★☆☆☆ Better for Water/Gate	★★★★☆ Strong Upper-Cycle Water	Pair with Gua Qi 7 (Sum of 10) or Gua Qi 3 (Pure One)	Favorable Wood/Fire/Water-bridged hearth on Red Yao
#27 Sơn Lôi Di (䷚) Qi 6 · Yun 7	★★★★☆ Strong Lower-Cycle Sitting	★★★☆☆ Secondary / Pair via Gua Qi	Pair with Gua Qi 4 (Sum of 10) or Gua Qi 6 (Pure One)	Favorable Wood/Fire/Water-bridged hearth on Red Yao
#18 Sơn Phong Cổ (䷑) Qi 6 · Yun 3	★★☆☆☆ Better for Water/Gate	★★★★☆ Strong Upper-Cycle Water	Pair with Gua Qi 4 (Sum of 10) or Gua Qi 6 (Pure One)	Favorable Wood/Fire/Water-bridged hearth on Red Yao
#61 Phong Trạch Trung Phu (䷼) Qi 2 · Yun 7	★★★★☆ Strong Lower-Cycle Sitting	★★★☆☆ Secondary / Pair via Gua Qi	Pair with Gua Qi 8 (Sum of 10) or Gua Qi 2 (Pure One)	Favorable Wood/Fire/Water-bridged hearth on Red Yao
#59 Phong Thủy Hoán (涣) Qi 2 · Yun 4	★★☆☆☆ Better for Water/Gate	★★★★☆ Strong Upper-Cycle Water	Pair with Gua Qi 8 (Sum of 10) or Gua Qi 2 (Pure One)	Favorable Wood/Fire/Water-bridged hearth on Red Yao
#53 Phong 山漸 (䷴) Qi 2 · Yun 3	★★☆☆☆ Better for Water/Gate	★★★★☆ Strong Upper-Cycle Water	Pair with Gua Qi 8 (Sum of 10) or Gua Qi 2 (Pure One)	Favorable Wood/Fire/Water-bridged hearth on Red Yao
#20 Phong Địa Quan (䷓) Qi 2 · Yun 8	★★★★☆ Strong Lower-Cycle Sitting	★★★☆☆ Secondary / Pair via Gua Qi	Pair with Gua Qi 8 (Sum of 10) or Gua Qi 2 (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 Xun Group (Wind ☴ · Tốn 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 Xun Group (Wind ☴ · Tốn Cung) (Gua Qi 2 — Yin Fire (He Tu 2–7 Same-Path Fire)), 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 2, matching the Sitting Mountain's Gua Qi 2 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 2 and Gua Qi 8 (2 + 8 = 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 2 and Gua Qi 7 (difference of 5, uniting Yang creation and Yin completion of Yin Fire (He Tu 2–7 Same-Path Fire)) 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: Multi-Generational Family Estate in Phu My Hung, HCMC — Sitting Yi #42 (116.5° Yao 5) with Stove on Jia Ren #37

When a three-generation family builds a legacy compound, harmony between spouses, children's scholarship, and compounding investment returns must all lock together. In Phu My Hung, I aligned a corner villa sitting at 116.5° (Thìn Mountain, Yao 5 of #42 Wind Thunder Yi 風雷益 ䷩: Gua Qi 2 Fire, Star Period 9 Direct Spirit—'With a sincere heart asking to benefit below, supreme auspiciousness') and set the kitchen hearth at 121.4° (Yao 4 of #37 Wind Fire Jia Ren 風火家人 ䷤: Gua Qi 2 Fire, Star Period 6—'Enriching the family, great auspiciousness'). The front courtyard gate opened toward 164.5° (#32 Heng, Gua Qi 8 Wood, Star Period 9), completing a textbook 2+8=10 Sum-of-Ten and Double Period-9 axis. Both grandchildren won international university scholarships, and the family's real estate portfolio compounded steadily.

FIELD AUDIT #2 · MASTER UNG KHIEM ARCHIVE

Case Study 2: International Law & Wealth Advisory Firm in Hanoi — Activating #61 Zhong Fu (128.0° Yao 5) & #57 Xun (99.8° Yao 5)

Trust is the currency of advisory firms. A wealth management and corporate law practice in Hoan Kiem District experienced client attrition after renovating their reception lobby onto a Small Void line at 123.75°. We re-angled the main glass entrance doors to 99.8° (Yao 5 of #57 Xun Wei Feng 巽為風 ䷸: Gua Qi 2 Fire, Star Period 1—forming 1+9=10 Indirect Spirit water/qi intake for Period 9) and positioned the managing partner's suite at 128.0° (Yao 5 of #61 Wind Lake Zhong Fu 風澤中孚 ䷼: Gua Qi 2 + Star Period 7 = built-in He Tu 2–7 Same-Path Fire, 'Possessing sincerity that links together, no error'). Client retention and high-net-worth referrals surged within four months.

Measure Your Exact Xun Group ☴ Wind Hexagram & 384-Yao Line on Your Floor Plan

Want to verify which of the 64 Early Heaven Hexagrams and 384 individual lines your home, villa, or corporate headquarters sits on—and whether it locks into Period 9 Direct and Indirect Spirit resonance? Launch Master Ung Khiem's interactive tools now:

☯️ Xuan Kong Da Gua Hub 🧭 Launch Luo Pan Pro (64 Hexagrams & 384 Yao) 🏠 3D Home Feng Shui Simulator

12. Frequently Asked Questions (FAQ) & Classical Bibliography on the Xun Group (Wind ☴ · Tốn Cung)

1. Which 8 hexagrams belong to the Xun Group (Wind ☴ · Tốn 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 Xun Group (Wind ☴ · Tốn Cung) are #57 Tốn Vi Phong (䷸), #9 Phong Thiên Tiểu Súc (䷈), #37 Phong Hỏa Gia Nhân (䷤), #42 Phong Lôi Ích (䷩), #25 Thiên Lôi Vô Vọng (䷘), #21 Hỏa Lôi Phệ Hạp (䷔), #27 Sơn Lôi Di (䷚), #18 Sơn Phong Cổ (䷑). On the San Yuan 360° Upper-Trigram Compass Ring, the 8 hexagrams sharing Xun ☴ as their Upper (Outer) Trigram—all carrying Gua Qi 2 (Yin Fire (He Tu 2–7 Same-Path Fire))—are #57 Tốn Vi Phong (䷸), #9 Phong Thiên Tiểu Súc (䷈), #37 Phong Hỏa Gia Nhân (䷤), #42 Phong Lôi Ích (䷩), #61 Phong Trạch Trung Phu (䷼), #59 Phong Thủy Hoán (涣), #53 Phong 山漸 (䷴), #20 Phong Địa Quan (䷓). 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 Xun Palace carry Gua Qi 2, 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 #57, 1st Gen #9, 2nd Gen #37, and 3rd Gen #42), only the bottom three lines (Lower Trigram) change, leaving Xun ☴ unchanged on top with Gua Qi 2. Once the transformation climbs into the 4th and 5th lines (4th Gen #25, 5th Gen #21, Wandering Soul #27, and Returning Soul #18), the Upper Trigram changes, shifting their compass Gua Qi while preserving their Xun Palace ancestral soul.

3. Which hexagram in the Xun Group (Wind ☴ · Tốn Cung) is the strongest Sitting Mountain in Period 9 (2024–2043)?

One hexagram stands supreme. The 3rd-Generation Lower-Cycle Parent Hexagram #42 Phong Lôi Ích (風雷益 ䷩) at Thìn (112.500°–118.125°) carries Star Period 9 (Right Assistant / You Bi) and Gua Qi 2. 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 Xun Group (Wind ☴ · Tốn Cung) is best for the Main Gate or Water Mouth in Period 9?

Tap the Pure Root! The doubled hexagram #57 Tốn Vi Phong (巽為風 ䷸) at Mão – Ất (95.625°–101.250°) carries Star Period 1 (Greedy Wolf / Tan Lang) and Gua Qi 2. In Period 9, Star Period 1 forms Sum of Ten (1 + 9 = 10) with the ruling period, making #57 Tốn Vi Phong the crown Indirect Spirit (Linh Thần) for main gates, water mouths, pools, and road junctions.

5. How do I pair the Xun Group (Wind ☴ · Tốn 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-Xun hexagram (Gua Qi 2) with any hexagram from the Zhen Group ☳ (Gua Qi 8 Wood · 2 + 8 = 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 2 with the Kan Group ☵ (Gua Qi 7 Fire · 2 – 7 Same-Path Fire) so their Gua Qi numbers differ by 5 and unite within Yin Fire (He Tu 2–7 Same-Path Fire).

6. How do I avoid Void Lines (Không Vong) when aligning a building to the Xun Group (Wind ☴ · Tốn 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 Xun Group (Wind ☴ · Tốn 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 #42 Phong Lôi Ích, #57 Tốn Vi Phong, and #37 Phong Hỏa Gia Nhân 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 Xun Group (Wind ☴ · Tốn 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 2 (Pure One Qi), Gua Qi 8 (Sum of Ten), or Gua Qi 7 (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).