Why do the first 4 hexagrams of the Qian Palace share Gua Qi 9, 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 Qian ☰ on top (Gua Qi 9). 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 Qian Palace ancestral soul.

Which hexagrams in the Qian Group (Heaven ☰ · Càn Cung) are strongest for Period 9 (2024–2043)?

For Sitting Mountain, high terrain, and executive backing (Direct Spirit / Chinh Than), the crown jewel is #12 Thiên Địa Bĩ (天地否 ䷋), the 3rd-Generation Parent Hexagram carrying Star Period 9 at Mùi – Khôn (196.875°–202.500°). For Main Gate, Water Mouth, and driveway intake (Indirect Spirit / Linh Than), the prime choice is #1 Càn Vi Thiên (乾為天 ䷀), the Pure Root Hexagram carrying Star Period 1 (forming 1+9=10 Sum-of-Ten with Period 9) at Tuất – Càn (300.000°–305.625°).

How do Sum of Ten (He Shi) and Difference of Five (He Sheng Cheng) work for the Qian Group (Heaven ☰ · Càn Cung)?

All 8 Upper-Qian compass hexagrams carry Gua Qi 9. They achieve Husband-Wife Sum-of-Ten (He Shi) when paired with Kun Group ☷ (Gua Qi 1 Water · 9 + 1 = 10), and achieve He Tu Generative Difference-of-Five (He Sheng Cheng) when paired with Dui Group ☱ (Gua Qi 4 Metal · 9 – 4 = 5).

☰ XUAN KONG DA GUA · 8 TRIGRAM PALACES Gua Qi 9 · Yang Metal (He Tu 4–9 Allied Metal) • Early Heaven 1 / Later Heaven 6

Qian Group (Heaven ☰ · Càn Cung) in Xuan Kong Da Gua (乾宮八卦): 8 Palace Hexagrams, 384-Yao Degrees & Period 9 Mastery

Q: Which 8 hexagrams belong to the Qian Group (Heaven ☰ · Càn Cung) in Xuan Kong Da Gua?

In the Jing Fang 8-Palace lineage, the Qian Group (Heaven ☰ · Càn Cung) comprises #1 Càn Vi Thiên (䷀), #44 Thiên Phong Cấu (䷫), #33 Thiên Sơn Độn (䷠), #12 Thiên Địa Bĩ (䷋), #20 Phong Địa Quan (䷓), #23 Sơn Địa Bác (䷖), #35 Hỏa Địa Tấn (䷢), #14 Hỏa Thiên Đại Hữu (䷍). On the San Yuan 360-degree Upper-Trigram Gua Qi compass ring, the 8 hexagrams sharing Upper Trigram Qian ☰ (all carrying Gua Qi 9 — Yang Metal (He Tu 4–9 Allied Metal)) are #1 Càn Vi Thiên (䷀), #44 Thiên Phong Cấu (䷫), #33 Thiên Sơn Độn (䷠), #12 Thiên Địa Bĩ (䷋), #10 Thiên Trạch Lý (䷉), #13 Thiên Hỏa Đồng Nhân (䷌), #25 Thiên Lôi Vô Vọng (䷘), #6 Thiên Thủy Tụng (䷅).

Heaven never bows. Across the 64 hexagrams of Xuan Kong Da Gua (玄空大卦), the Qian Palace Group (乾宮八卦 — Nhóm Quái Càn ☰) commands the apex of pure Yang creative force: holding Early Heaven Number 1 at the southern zenith of Fu Xi's cosmos, Later Heaven Number 6 in the Northwest imperial sector, and Gua Qi Number 9 (He Tu 4–9 Yang Metal) on the San Yuan compass ring. Walk a site with a precision Luo Pan and you immediately discover why masters revere this palace in Period 9 (2024–2043): its 3rd-generation Parent Hexagram, Heaven Earth Pi (#12 天地否 ䷋), unites Gua Qi 9 with Star Period 9 into the sole Double-Nine Crown Jewel on the entire 360° horizon.

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

Qian Group (Heaven ☰ · Càn Cung) in Xuan Kong Da Gua Feng Shui

Core Trigram Palace Dossier: Qian Group ☰ Heaven

Palace Family:

Qian Group (Heaven ☰ · Càn Cung) (乾宮八卦 · Father / Patriarch (Lão Phụ 老父))

Cosmic Image:

☰ Creative Heaven (Tiān 天) — Trigram Element: Pure Yang Metal (Dương Kim 陽金)

Early & Later Bagua:

Early Heaven #1 (Due South (Early Heaven Axis Top)) · Later Heaven #6 (Northwest (Tuất – Càn – Hợi · 292.5°–337.5°))

Da Gua Outer Qi:

Gua Qi 9 — Yang Metal (He Tu 4–9 Allied Metal)

Jing Fang 8 Gua:

#1 Càn Vi Thiên (䷀), #44 Thiên Phong Cấu (䷫), #33 Thiên Sơn Độn (䷠), #12 Thiên Địa Bĩ (䷋), #20 Phong Địa Quan (䷓), #23 Sơn Địa Bác (䷖), #35 Hỏa Địa Tấn (䷢), #14 Hỏa Thiên Đại Hữu (䷍)

Upper-Qian Ring:

#1 Càn Vi Thiên (䷀), #44 Thiên Phong Cấu (䷫), #33 Thiên Sơn Độn (䷠), #12 Thiên Địa Bĩ (䷋), #10 Thiên Trạch Lý (䷉), #13 Thiên Hỏa Đồng Nhân (䷌), #25 Thiên Lôi Vô Vọng (䷘), #6 Thiên Thủy Tụng (䷅)

Period 9 Crown Pair:

Direct Spirit: #12 Thiên Địa Bĩ ䷋ (Period 9) · Indirect Spirit: #1 Càn Vi Thiên ䷀ (Period 1)

✦ Classical Key: In Period 9 (2024–2043), every Upper-Qian hexagram carries Gua Qi 9 (Yang Metal)—resonating directly with the number 9 of the ruling 20-year Period! Above all, #12 Heaven Earth Pi (䷋) holds both Gua Qi 9 and Star Period 9 (Double-Nine Direct Spirit), while #1 Qian Wei Tian (䷀) holds Gua Qi 9 and Star Period 1 (forming 1+9=10 Sum-of-Ten Indirect Spirit).

Executive Summary for Practitioners & AI Search (GEO Summary)

Dual Classification Mastery: In Xuan Kong Da Gua (玄空大卦), the Qian Group (Heaven ☰ · Càn Cung) is analyzed across two interlocking axes: (1) the Jing Fang 8-Palace Lineage (Bát Cung Kinh Phòng) comprising #1 Càn Vi Thiên (䷀), #44 Thiên Phong Cấu (䷫), #33 Thiên Sơn Độn (䷠), #12 Thiên Địa Bĩ (䷋), #20 Phong Địa Quan (䷓), #23 Sơn Địa Bác (䷖), #35 Hỏa Địa Tấn (䷢), #14 Hỏa Thiên Đại Hữu (䷍), and (2) the San Yuan Upper-Trigram Compass Ring comprising all 8 hexagrams with Qian ☰ as their Upper (Outer) Trigram (#1 Càn Vi Thiên (䷀), #44 Thiên Phong Cấu (䷫), #33 Thiên Sơn Độn (䷠), #12 Thiên Địa Bĩ (䷋), #10 Thiên Trạch Lý (䷉), #13 Thiên Hỏa Đồng Nhân (䷌), #25 Thiên Lôi Vô Vọng (䷘), #6 Thiên Thủy Tụng (䷅)), which universally carry Gua Qi 9 (Yang Metal (He Tu 4–9 Allied Metal)).
Why the First 4 Hexagrams Overlap Both Systems: In Jing Fang's 8-step line transformation, Steps 0, 1, 2, and 3 (#1 Càn Vi Thiên, #44 Thiên Phong Cấu, #33 Thiên Sơn Độn, and #12 Thiên Địa Bĩ) transform only the Lower (Inner) Trigram while keeping Qian ☰ intact on top. Thus they hold Gua Qi 9 on the Luo Pan and belong to both lists simultaneously.
Supreme Resonance Partners: Every Upper-Qian hexagram (Gua Qi 9) locks into Sum of Ten (He Shi 合十) with the Kun Group ☷ (Gua Qi 1 Water · 9 + 1 = 10) and locks into He Tu Generative Difference of Five (He Sheng Cheng 合生成) with the Dui Group ☱ (Gua Qi 4 Metal · 9 – 4 = 5).
Period 9 (2024–2043) Mountain & Water Formula: Anchor the Sitting Mountain, CEO Office, or Master Bed on the 3rd-Generation Parent Hexagram #12 Thiên Địa Bĩ (天地否 ䷋) at Mùi – Khôn (196.875°–202.500°) (carrying Timely Star Period 9 Direct Spirit), and open the Main Gate, Driveway, or Water Mouth on the Pure Root Hexagram #1 Càn Vi Thiên (乾為天 ䷀) at Tuất – Càn (300.000°–305.625°) (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 Qian Group (Heaven ☰ · Càn 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 Qian Group (Heaven ☰ · Càn Cung) (乾宮八卦). To master its eight constituent hexagrams on a San Yuan Luo Pan, a practitioner must first internalize the three distinct numerical identities that Trigram Qian (乾 ☰) 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, Qian ☰ holds Early Heaven Number 1 and resides at Due South (Early Heaven Axis Top), embodying Creative Heaven (Tiān 天) and the archetypal family role of Father / Patriarch (Lão Phụ 老父).
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, Qian ☰ moves to Northwest (Tuất – Càn – Hợi · 292.5°–337.5°) and governs Later Heaven Luo Shu Number 6, radiating the trigram Five Phase of Pure Yang Metal (Dương Kim 陽金).
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 Qian ☰ lands on Luo Shu Number 9! Converted through the He Tu Creation Formula (1–6 Water, 2–7 Fire, 3–8 Wood, 4–9 Metal), every hexagram with Qian ☰ as its Upper (Outer) Trigram carries Gua Qi 9 — Yang Metal (He Tu 4–9 Allied Metal).

「乾山乾向水流乾，乾峰出狀元；坤山坤向水流坤，富貴永يل。」 Qián shān Qián xiàng shuǐ liú Qián, Qián fēng chū Zhuàng Yuán; Kūn shān Kūn xiàng shuǐ liú Kūn, fù guì yǒng míng yuán.
When a Qian Mountain faces Qian and water flows through Qian, a Qian peak produces the Imperial First Scholar (Zhuang Yuan); when a Kun Mountain faces Kun and water flows through Kun, wealth and nobility endure forever.
— Grandmaster Yang Yun Song (楊筠松, Tang Dynasty), «Tian Yu Jing · Heavenly Jade Classic» (天玉經)

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 Qian Group (Heaven ☰ · Càn 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:

「大哉乾元，萬物資始，乃統天。雲行雨施，品物流形。」 Dà zāi Qián yuán, wàn wù zī shǐ, nǎi tǒng tiān. Yún xíng yǔ shī, pǐn wù liú xíng.
Vast indeed is the sublime originating power of Qian! All myriad things owe their beginning to it, and thus it governs Heaven. Clouds move and rain is distributed, and all beings flow into their distinct forms.
— «Book of Changes · Commentary on the Judgments of Qian» (周易·乾卦·彖傳)

Numbers govern form. Form channels Qi. When you step onto a site with your Luo Pan, understanding how Early Heaven 1, Later Heaven 6, and Da Gua Outer Qi 9 interlock within the Qian Group (Heaven ☰ · Càn Cung) separates authentic lineage mastery from textbook guesswork.

2. Dual Classification Mechanics: Jing Fang 8-Palace Lineage vs. San Yuan Upper-Trigram Gua Qi 9 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 Qian Group (Heaven ☰ · Càn Cung) as #1 Càn Vi Thiên (䷀), #44 Thiên Phong Cấu (䷫), #33 Thiên Sơn Độn (䷠), #12 Thiên Địa Bĩ (䷋), #20 Phong Địa Quan (䷓), #23 Sơn Địa Bác (䷖), #35 Hỏa Địa Tấn (䷢), #14 Hỏa Thiên Đại Hữu (䷍), whereas the outer Gua Qi table of a San Yuan Luo Pan lists the 8 hexagrams of Gua Qi 9 (Qian ☰) as #1 Càn Vi Thiên (䷀), #44 Thiên Phong Cấu (䷫), #33 Thiên Sơn Độn (䷠), #12 Thiên Địa Bĩ (䷋), #10 Thiên Trạch Lý (䷉), #13 Thiên Hỏa Đồng Nhân (䷌), #25 Thiên Lôi Vô Vọng (䷘), #6 Thiên Thủy Tụng (䷅)? 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 #1 Càn Vi Thiên (䷀), 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 Qian ☰ as their Upper Trigram share Gua Qi 9 (Yang Metal (He Tu 4–9 Allied Metal)) 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 Qian Group (Heaven ☰ · Càn Cung):

Steps 0, 1, 2, and 3 (Pure Root #1, 1st Gen #44, 2nd Gen #33, and 3rd Gen #12): Because only the Lower (Inner) Trigram lines change during the first three generations, their Upper (Outer) Trigram remains Qian ☰! Consequently, these first four hexagrams carry Gua Qi 9 and belong to both the Jing Fang Qian Palace and the Upper-Qian Compass Ring! Specifically, Step 0 (#1 Càn Vi Thiên) is the Period 1 Upper-Cycle Parent, Step 1 (#44 Thiên Phong Cấu) is the Period 2 Jiangdong Hexagram, Step 2 (#33 Thiên Sơn Độn) is the Period 6 North-South Opposite Hexagram, and Step 3 (#12 Thiên Địa Bĩ) is the Period 9 Lower-Cycle Parent!
Steps 4, 5, 6, and 7 (4th Gen #20, 5th Gen #23, Wandering Soul #35, and Returning Soul #14): Once the Jing Fang transformation climbs into the 4th and 5th lines, the Upper Trigram changes from Qian ☰ 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 (#10, #13, #25, and #6): Conversely, four hexagrams born as the 4th Gen, 5th Gen, Wandering Soul, and Returning Soul of other Jing Fang palaces acquire Qian ☰ as their Upper Trigram—supplying Star Periods 4, 3, 8, and 7 inside the Gua Qi 9 compass family!

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

3. Master Reference Matrix: Complete 8 Jing Fang Palace Hexagrams & 8 Upper-Qian 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 Qian Group (Heaven ☰ · Càn Cung), while Table 2 synthesizes the 8 San Yuan Upper-Qian Compass Ring Hexagrams that share Gua Qi 9 (Yang Metal (He Tu 4–9 Allied Metal)).

Table 1: The 8 Jing Fang Palace Hexagrams (Bát Cung Kinh Phòng) of the Qian Group (Heaven ☰ · Càn 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
#01 Càn Vi Thiên Qian (The Creative Heaven) · 乾為天 ䷀	0. Pure Root (Bát Thuần)	Qian ☰ / Qian ☰	Gua Qi 9 Yang Metal (4-9 Metal)	Period 1 Greedy Wolf (Tan Lang)	Tuất – Càn (300.000°–305.625°) Red: Yao 2 (300.938°–301.875°), Yao 5 (303.750°–304.688°)	Supreme Sum-of-Ten Indirect Spirit (Period 1 + Period 9 = 10; Gua Qi 9 Metal)
#44 Thiên Phong Cấu Gou (Coming to Meet) · 天風姤 ䷫	1. 1st Gen (Nhất Thế)	Qian ☰ / Xun ☴	Gua Qi 9 Yang Metal (4-9 Metal)	Period 2 Giant Gate (Ju Men)	Ngọ – Đinh (180.000°–185.625°) Red: Yao 2 (180.938°–181.875°), Yao 4 (182.813°–183.750°), Yao 5 (183.750°–184.688°)	Upper Cycle Indirect Spirit · Gua Qi 9 Timely Number
#33 Thiên Sơn Độn Dun (Retreat) · 天山遯 ䷠	2. 2nd Gen (Nhị Thế)	Qian ☰ / Gen ☶	Gua Qi 9 Yang Metal (4-9 Metal)	Period 6 Military Arts (Wu Qu)	Đinh – Mùi (185.625°–191.250°) Red: Yao 3 (187.500°–188.438°), Yao 5 (189.375°–190.313°), Yao 6 (190.313°–191.250°)	Lower Cycle Direct Spirit Group (Period 6 + Gua Qi 9)
#12 Thiên Địa Bĩ Pi (Standstill / Stagnation) · 天地否 ䷋	3. 3rd Gen (Tam Thế)	Qian ☰ / Kun ☷	Gua Qi 9 Yang Metal (4-9 Metal)	Period 9 Right Assistant (You Bi)	Mùi – Khôn (196.875°–202.500°) Red: Yao 2 (197.813°–198.750°), Yao 5 (200.625°–201.563°), Yao 6 (201.563°–202.500°)	★ DOUBLE-NINE CROWN JEWEL (Gua Qi 9 + Star Period 9 Direct Spirit)
#20 Phong Địa Quan Guan (Contemplation / View) · 風地觀 ䷓	4. 4th Gen (Tứ Thế)	Xun ☴ / Kun ☷	Gua Qi 2 Yin Fire (2-7 Fire)	Period 8 Left Assistant (Zuo Fu)	Ất – Thìn (106.875°–112.500°) Red: Yao 3 (108.750°–109.688°), Yao 5 (110.625°–111.563°)	Lower Cycle Direct Spirit Group (Gua Qi 2 Fire + Period 8 = Sum of Ten 2+8=10)
#23 Sơn Địa Bác Bo (Splitting Apart) · 山地剝 ䷖	5. 5th Gen (Ngũ Thế)	Gen ☶ / Kun ☷	Gua Qi 6 Yin Water (1-6 Water)	Period 4 Literary Arts (Wen Qu)	Tý (0.000°–5.625°) Red: Yao 5 (3.750°–4.688°), Yao 6 (4.688°–5.625°)	Upper Cycle Indirect Spirit (Gua Qi 6 + Period 4 = Internal Sum of Ten 6+4=10)
#35 Hỏa Địa Tấn Jin (Progress) · 火地晉 ䷢	6. Wandering Soul (Du Hồn)	Li ☲ / Kun ☷	Gua Qi 3 Yang Wood (3-8 Wood)	Period 7 Broken Army (Po Jun)	Canh (241.875°–247.500°) Red: Yao 2 (242.813°–243.750°), Yao 5 (245.625°–246.563°)	Lower Cycle Direct Spirit Group (Gua Qi 3 + Period 7 = Internal Sum of Ten 3+7=10)
#14 Hỏa Thiên Đại Hữu Da You (Great Possession) · 火天大有 ䷍	7. Returning Soul (Quy Hồn)	Li ☲ / Qian ☰	Gua Qi 3 Yang Wood (3-8 Wood)	Period 3 Rank / Lu Cun	Canh – Dậu (264.375°–270.000°) Red: Yao 2 (265.313°–266.250°), Yao 3 (266.250°–267.188°), Yao 5 (268.125°–269.063°)	Upper Cycle Indirect Spirit · Returning Soul Treasure Hexagram (Double-3)

Table 2: The 8 San Yuan Compass Ring Hexagrams Sharing Upper Trigram Qian ☰ (All Carrying Gua Qi 9 — Yang Metal (He Tu 4–9 Allied Metal))
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
#01 Càn Vi Thiên (乾為天 ䷀)	Qian ☰ / Qian ☰	Gua Qi 9 (Yang Metal)	Period 1 (Greedy Wolf (Tan Lang))	Yes (Steps 0–3)	Tuất – Càn (300.000°–305.625°)	Gua Qi 1 (He Shi) · Period 9 (He Shi)
#44 Thiên Phong Cấu (天風姤 ䷫)	Qian ☰ / Xun ☴	Gua Qi 9 (Yang Metal)	Period 2 (Giant Gate (Ju Men))	Yes (Steps 0–3)	Ngọ – Đinh (180.000°–185.625°)	Gua Qi 1 (He Shi) · Period 8 (He Shi)
#33 Thiên Sơn Độn (天山遯 ䷠)	Qian ☰ / Gen ☶	Gua Qi 9 (Yang Metal)	Period 6 (Military Arts (Wu Qu))	Yes (Steps 0–3)	Đinh – Mùi (185.625°–191.250°)	Gua Qi 1 (He Shi) · Period 4 (He Shi)
#12 Thiên Địa Bĩ (天地否 ䷋)	Qian ☰ / Kun ☷	Gua Qi 9 (Yang Metal)	Period 9 (Right Assistant (You Bi))	Yes (Steps 0–3)	Mùi – Khôn (196.875°–202.500°)	Gua Qi 1 (He Shi) · Period 1 (He Shi)
#10 Thiên Trạch Lý (天澤履 ䷉)	Qian ☰ / Dui ☱	Gua Qi 9 (Yang Metal)	Period 4 (Literary Arts (Wen Qu))	Cross-Palace (Steps 4–7)	Tuất – Càn (305.625°–311.250°)	Gua Qi 1 (He Shi) · Period 6 (He Shi)
#13 Thiên Hỏa Đồng Nhân (天火同人 ䷌)	Qian ☰ / Li ☲	Gua Qi 9 (Yang Metal)	Period 3 (Rank / Lu Cun)	Cross-Palace (Steps 4–7)	Càn – Hợi (311.250°–316.875°)	Gua Qi 1 (He Shi) · Period 7 (He Shi)
#25 Thiên Lôi Vô Vọng (天雷无妄 ䷘)	Qian ☰ / Zhen ☳	Gua Qi 9 (Yang Metal)	Period 8 (Left Assistant (Zuo Fu))	Cross-Palace (Steps 4–7)	Càn – Hợi (316.875°–322.500°)	Gua Qi 1 (He Shi) · Period 2 (He Shi)
#06 Thiên Thủy Tụng (天水訟 ䷅)	Qian ☰ / Kan ☵	Gua Qi 9 (Yang Metal)	Period 7 (Broken Army (Po Jun))	Cross-Palace (Steps 4–7)	Đinh – Mùi (191.250°–196.875°)	Gua Qi 1 (He Shi) · Period 3 (He Shi)

Figure 2: Comparison of the 8 Upper-Qian Compass Ring Hexagrams (all carrying Gua Qi 9) and their overlap with the Jing Fang Qian Palace.

Notice the mathematical elegance in Table 2: within the 8 hexagrams sharing Upper Trigram Qian ☰, 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 Qian Group (Heaven ☰ · Càn Cung): #1 Càn Vi Thiên (䷀), #44 Thiên Phong Cấu (䷫), #33 Thiên Sơn Độn (䷠), and #12 Thiên Địa Bĩ (䷋). Because all four retain Qian ☰ as their Upper (Outer) Trigram, all four carry Gua Qi 9 (Yang Metal (He Tu 4–9 Allied Metal)) 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 #01 · Qián Wéi Tiān · Jing Fang Step 0

#01. Càn Vi Thiên — Qian (The Creative Heaven) (乾為天 ䷀) · Gua Qi 9 & Period 1

1. Structural & Trigram Anatomy: Upper (Outer) Trigram Qian ☰ over Lower (Inner) Trigram Qian ☰. Jing Fang Step 0: Pure Palace Root (Bát Thuần Quái · 八純卦). Because its Upper (Outer) Trigram is Qian ☰ and its Jing Fang transformation remains within the lower three lines, #1 Càn Vi Thiên (乾為天 ䷀) belongs simultaneously to the Jing Fang Qian Palace and the San Yuan Upper-Qian Gua Qi 9 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, #1 Càn Vi Thiên 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 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 Tuất – Càn (300.000°–305.625°) within the Tuất / Càn (NW) mountain sector. Its prime Auspicious Red Jewel Lines (Hồng Tâm Cát Hào) are Yao 2 (300.938°–301.875°), Yao 5 (303.750°–304.688°) (each spanning exactly 0.9375°). Practitioners must strictly avoid the Void Taboo Zones (Không Vong Tuyến) at 300.000° ±0.75° (Hexagram Boundary Void), 305.625° ±0.45° (Inter-Gua Seam), where qi scatters into erratic turbulence.

4. Period 9 (2024–2043) Field Application (Sitting, Facing, Gate, Stove & Water): Supreme Sum-of-Ten Indirect Spirit (Period 1 + Period 9 = 10; Gua Qi 9 Metal). Prime Indirect Spirit (Ling Shen) for Water Mouth, Main Gate, or Driveway in Period 9; pairs with Kun #2 (Gua Qi 1) or Tai #11 (Period 9) for 1+9=10 completion. When activating #1 Càn Vi Thiên 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 #44 · Tiān Fēng Gòu · Jing Fang Step 1

#44. Thiên Phong Cấu — Gou (Coming to Meet) (天風姤 ䷫) · Gua Qi 9 & Period 2

1. Structural & Trigram Anatomy: Upper (Outer) Trigram Qian ☰ over Lower (Inner) Trigram Xun ☴. Jing Fang Step 1: 1st Generation (Nhất Thế Quái · 一世卦). Because its Upper (Outer) Trigram is Qian ☰ and its Jing Fang transformation remains within the lower three lines, #44 Thiên Phong Cấu (天風姤 ䷫) belongs simultaneously to the Jing Fang Qian Palace and the San Yuan Upper-Qian Gua Qi 9 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, #44 Thiên Phong Cấu 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 2 · Giant Gate (Ju Men) (Upper Cycle Jiangdong (1st Yao Change)), 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 Ngọ – Đinh (180.000°–185.625°) within the Ngọ / Đinh (S) mountain sector. Its prime Auspicious Red Jewel Lines (Hồng Tâm Cát Hào) are Yao 2 (180.938°–181.875°), Yao 4 (182.813°–183.750°), Yao 5 (183.750°–184.688°) (each spanning exactly 0.9375°). Practitioners must strictly avoid the Void Taboo Zones (Không Vong Tuyến) at 180.000° ±0.75° (Due South Cardinal Yin-Birth Seam), 185.625° ±0.45°, where qi scatters into erratic turbulence.

4. Period 9 (2024–2043) Field Application (Sitting, Facing, Gate, Stove & Water): Upper Cycle Indirect Spirit · Gua Qi 9 Timely Number. Marks the exact rebirth of Yin at 180° Due South. Best used for southern courtyard water collection or secondary gate pairing with Period 8 Wu Wang (#25) via 2+8=10. When activating #44 Thiên Phong Cấu 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 #33 · Tiān Shān Dùn · Jing Fang Step 2

#33. Thiên Sơn Độn — Dun (Retreat) (天山遯 ䷠) · Gua Qi 9 & Period 6

1. Structural & Trigram Anatomy: Upper (Outer) Trigram Qian ☰ over Lower (Inner) Trigram Gen ☶. Jing Fang Step 2: 2nd Generation (Nhị Thế Quái · 二世卦). Because its Upper (Outer) Trigram is Qian ☰ and its Jing Fang transformation remains within the lower three lines, #33 Thiên Sơn Độn (天山遯 ䷠) belongs simultaneously to the Jing Fang Qian Palace and the San Yuan Upper-Qian Gua Qi 9 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, #33 Thiên Sơn Độn 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 6 · Military Arts (Wu Qu) (Lower Cycle North-South Opposite (1st & 2nd Yao Change)), 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 Đinh – Mùi (185.625°–191.250°) within the Đinh (SSW) mountain sector. Its prime Auspicious Red Jewel Lines (Hồng Tâm Cát Hào) are Yao 3 (187.500°–188.438°), Yao 5 (189.375°–190.313°), Yao 6 (190.313°–191.250°) (each spanning exactly 0.9375°). Practitioners must strictly avoid the Void Taboo Zones (Không Vong Tuyến) at 185.625° ±0.45° (Gou–Dun Border), 191.250° ±0.45° (Dun–Song Border), where qi scatters into erratic turbulence.

4. Period 9 (2024–2043) Field Application (Sitting, Facing, Gate, Stove & Water): Lower Cycle Direct Spirit Group (Period 6 + Gua Qi 9). Strong Sitting Mountain spine for Period 9 estates needing quiet scholarly or strategic authority; pairs with Period 4 Lu (#10) for 6+4=10. When activating #33 Thiên Sơn Độn 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 #12 · Tiān Dì Pǐ · Jing Fang Step 3

#12. Thiên Địa Bĩ — Pi (Standstill / Stagnation) (天地否 ䷋) · Gua Qi 9 & Period 9

1. Structural & Trigram Anatomy: Upper (Outer) Trigram Qian ☰ over Lower (Inner) Trigram Kun ☷. Jing Fang Step 3: 3rd Generation (Tam Thế Quái · 三世卦). Because its Upper (Outer) Trigram is Qian ☰ and its Jing Fang transformation remains within the lower three lines, #12 Thiên Địa Bĩ (天地否 ䷋) belongs simultaneously to the Jing Fang Qian Palace and the San Yuan Upper-Qian Gua Qi 9 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, #12 Thiên Địa Bĩ 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 9 · Right Assistant (You Bi) (Lower Cycle Parent (All 3 Yao Opposite)), 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 Mùi – Khôn (196.875°–202.500°) within the Mùi / Khôn (SW) mountain sector. Its prime Auspicious Red Jewel Lines (Hồng Tâm Cát Hào) are Yao 2 (197.813°–198.750°), Yao 5 (200.625°–201.563°), Yao 6 (201.563°–202.500°) (each spanning exactly 0.9375°). Practitioners must strictly avoid the Void Taboo Zones (Không Vong Tuyến) at 196.875° ±0.45° (Song–Pi Seam), 202.500° ±0.75° (Mùi–Khôn Palace Boundary), where qi scatters into erratic turbulence.

4. Period 9 (2024–2043) Field Application (Sitting, Facing, Gate, Stove & Water): ★ DOUBLE-NINE CROWN JEWEL (Gua Qi 9 + Star Period 9 Direct Spirit). In I Ching divination Pi means stagnation, but in Xuan Kong Da Gua Period 9, Pi (#12) is the supreme Double-9 Parent Hexagram (Gua Qi 9 + Period 9)! Unrivaled for Sitting Mountain, CEO Throne, and Master Vault. When activating #12 Thiên Địa Bĩ 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).

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

Once the 3rd Generation (#12 Thiên Địa Bĩ) completes the transformation of the Lower Trigram, Jing Fang's line progression ascends into the Upper (Outer) Trigram across the 4th Generation (#20 Phong Địa Quan), 5th Generation (#23 Sơn Địa Bác), Wandering Soul (#35 Hỏa Địa Tấn), and Returning Soul (#14 Hỏa Thiên Đại Hữu). Watch how the Outer Trigram shifts across the palaces while the inner ancestral pulse of the Qian Group (Heaven ☰ · Càn Cung) drives their destiny:

King Wen #20 · Fēng Dì Guān · Jing Fang Step 4

#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 ☷. 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 Xun ☴), so on the San Yuan Luo Pan its spatial Gua Qi becomes Gua Qi 2 (Yin Fire (2-7 Fire)) while its ancestral soul remains rooted in the Qian Palace. 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).

King Wen #23 · Shān Dì Bō · Jing Fang Step 5

#23. Sơn Địa Bác — Bo (Splitting Apart) (山地剝 ䷖) · Gua Qi 6 & Period 4

1. Structural & Trigram Anatomy: Upper (Outer) Trigram Gen ☶ over Lower (Inner) Trigram Kun ☷. 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 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 Qian Palace. Measure the angle twice. Never guess.

2. Two-Ring Numerical Code (Gua Qi & Gua Yun): On the outer San Yuan Gua Qi ring, #23 Sơn Địa Bác 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 4 · Literary Arts (Wen Qu) (Upper Cycle North-South (5th Gen of Qian)), 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 Tý (0.000°–5.625°) within the Tý (Due N) mountain sector. Its prime Auspicious Red Jewel Lines (Hồng Tâm Cát Hào) are Yao 5 (3.750°–4.688°), Yao 6 (4.688°–5.625°) (each spanning exactly 0.9375°). Practitioners must strictly avoid the Void Taboo Zones (Không Vong Tuyến) at 0.000° ±0.75° (Due North Cardinal Axis), 5.625° ±0.45°, where qi scatters into erratic turbulence.

4. Period 9 (2024–2043) Field Application (Sitting, Facing, Gate, Stove & Water): Upper Cycle Indirect Spirit (Gua Qi 6 + Period 4 = Internal Sum of Ten 6+4=10). Internal Sum-of-Ten hexagram at Due North (Gua Qi 6 + Period 4 = 10). Serves as an Indirect Spirit water intake when carefully avoiding the 0° Due North cardinal void. When activating #23 Sơn Địa Bác 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 #35 · Huǒ Dì Jìn · Jing Fang Step 6

#35. Hỏa Địa Tấn — Jin (Progress) (火地晉 ䷢) · Gua Qi 3 & Period 7

1. Structural & Trigram Anatomy: Upper (Outer) Trigram Li ☲ over Lower (Inner) Trigram Kun ☷. 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 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 Qian Palace. Measure the angle twice. Never guess.

2. Two-Ring Numerical Code (Gua Qi & Gua Yun): On the outer San Yuan Gua Qi ring, #35 Hỏa Địa Tấn 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 7 · Broken Army (Po Jun) (Lower Cycle Jiangxi Opposite (Wandering Soul of Qian)), 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 Canh (241.875°–247.500°) within the Canh (WSW) mountain sector. Its prime Auspicious Red Jewel Lines (Hồng Tâm Cát Hào) are Yao 2 (242.813°–243.750°), Yao 5 (245.625°–246.563°) (each spanning exactly 0.9375°). Practitioners must strictly avoid the Void Taboo Zones (Không Vong Tuyến) at 241.875° ±0.45°, 247.500° ±0.75° (Thân–Canh 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 3 + Period 7 = Internal Sum of Ten 3+7=10). Wandering Soul of Qian Palace with built-in Sum-of-Ten (Gua Qi 3 Wood + Period 7 = 10). Excellent for executive promotion, public visibility, and Stove facing. When activating #35 Hỏa Địa Tấn 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 #14 · Huǒ Tiān Dà Yǒu · Jing Fang Step 7

#14. Hỏa Thiên Đại Hữu — Da You (Great Possession) (火天大有 ䷍) · Gua Qi 3 & Period 3

1. Structural & Trigram Anatomy: Upper (Outer) Trigram Li ☲ over Lower (Inner) Trigram Qian ☰. 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 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 Qian Palace. Measure the angle twice. Never guess.

2. Two-Ring Numerical Code (Gua Qi & Gua Yun): On the outer San Yuan Gua Qi ring, #14 Hỏa Thiên Đại Hữu 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 3 · Rank / Lu Cun (Upper Cycle Jiangxi (Returning Soul of Qian)), 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 Canh – Dậu (264.375°–270.000°) within the Canh / Dậu (W) mountain sector. Its prime Auspicious Red Jewel Lines (Hồng Tâm Cát Hào) are Yao 2 (265.313°–266.250°), Yao 3 (266.250°–267.188°), Yao 5 (268.125°–269.063°) (each spanning exactly 0.9375°). Practitioners must strictly avoid the Void Taboo Zones (Không Vong Tuyến) at 264.375° ±0.45°, 270.000° ±0.75° (Due West Cardinal 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 Treasure Hexagram (Double-3). Returning Soul of Qian Palace (Fire in the Sky). Supreme for Main Gate, Commercial Facade, or Water Mouth when paired with Kan Gua Qi 7 / Period 7 (3+7=10). When activating #14 Hỏa Thiên Đại Hữu 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).

6. Upper-Qian Compass Ring Equivalents: The 4 Cross-Palace Hexagrams Completing the Gua Qi 9 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 9 (Yang Metal (He Tu 4–9 Allied Metal))—whether to build a Pure One Hexagram (Yi Gua Chun Qing) formation or to lock into Sum-of-Ten with Kun Group ☷ (Gua Qi 1 Water · 9 + 1 = 10)—you must also command the four hexagrams whose Upper Trigram is Qian ☰ even though their Jing Fang root lies in another palace: #10 Thiên Trạch Lý (䷉), #13 Thiên Hỏa Đồng Nhân (䷌), #25 Thiên Lôi Vô Vọng (䷘), and #6 Thiên Thủy Tụng (䷅).

King Wen #10 · Tiān Zé Lǚ · Upper-Qian Compass Ring Member · North-South Eight Spirits (Literary · Wen Qu) — Only 3rd (top) Yao differs from Upper Trigram

#10. Thiên Trạch Lý — Lu (Treading / Conduct) (天澤履 ䷉) · Gua Qi 9 & Period 4

1. Structural & Trigram Anatomy: Upper (Outer) Trigram Qian ☰ over Lower (Inner) Trigram Dui ☱. Upper-Qian 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 Qian ☰—meaning on the 360° San Yuan Luo Pan it carries pure Gua Qi 9 (Yang Metal (He Tu 4–9 Allied Metal)) and completes the 8-hexagram Upper-Qian ring! Measure the angle twice. Never guess.

2. Two-Ring Numerical Code (Gua Qi & Gua Yun): On the outer San Yuan Gua Qi ring, #10 Thiên Trạch Lý 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 4 · Literary Arts (Wen Qu) (Upper Cycle North-South (3rd Yao Change · 5th Gen of Gen)), 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 – Càn (305.625°–311.250°) within the Càn (NW) mountain sector. Its prime Auspicious Red Jewel Lines (Hồng Tâm Cát Hào) are Yao 2 (306.563°–307.500°), Yao 5 (309.375°–310.313°) (each spanning exactly 0.9375°). Practitioners must strictly avoid the Void Taboo Zones (Không Vong Tuyến) at 305.625° ±0.45°, 311.250° ±0.45°, where qi scatters into erratic turbulence.

4. Period 9 (2024–2043) Field Application (Sitting, Facing, Gate, Stove & Water): Upper-Qian Gua Qi 9 Metal · Period 4 Indirect Spirit. Upper-Qian compass hexagram (Gua Qi 9) and 5th Generation of Gen Palace. Ideal for Main Gate or Water Mouth pairing with Period 6 Dun (#33) or Da Chu (#26) via 4+6=10. When activating #10 Thiên Trạch Lý 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 #13 · Tiān Huǒ Tóng Rén · Upper-Qian Compass Ring Member · Jiangxi Hexagram (Rank · Lu Cun) — Only 2nd (middle) Yao differs from Upper Trigram

#13. Thiên Hỏa Đồng Nhân — Tong Ren (Fellowship) (天火同人 ䷌) · Gua Qi 9 & Period 3

1. Structural & Trigram Anatomy: Upper (Outer) Trigram Qian ☰ over Lower (Inner) Trigram Li ☲. Upper-Qian 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 Qian ☰—meaning on the 360° San Yuan Luo Pan it carries pure Gua Qi 9 (Yang Metal (He Tu 4–9 Allied Metal)) and completes the 8-hexagram Upper-Qian ring! Measure the angle twice. Never guess.

2. Two-Ring Numerical Code (Gua Qi & Gua Yun): On the outer San Yuan Gua Qi ring, #13 Thiên Hỏa Đồng Nhân 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 3 · Rank / Lu Cun (Upper Cycle Jiangxi (2nd Yao Change · Returning Soul of Li)), 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 (311.250°–316.875°) within the Càn (NW) mountain sector. Its prime Auspicious Red Jewel Lines (Hồng Tâm Cát Hào) are Yao 1 (311.250°–312.188°), Yao 2 (312.188°–313.125°), Yao 5 (315.000°–315.938°) (each spanning exactly 0.9375°). Practitioners must strictly avoid the Void Taboo Zones (Không Vong Tuyến) at 311.250° ±0.45°, 316.875° ±0.45°, where qi scatters into erratic turbulence.

4. Period 9 (2024–2043) Field Application (Sitting, Facing, Gate, Stove & Water): Upper-Qian Gua Qi 9 Metal · Period 3 Indirect Spirit (Returning Soul of Li). Bridges the Qian 9 Metal Upper Trigram with the Returning Soul of Li Fire. Exceptional for corporate headquarters doors, alliance-building, and Period 9 facing with 3+7=10. When activating #13 Thiên Hỏa Đồng Nhân 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 #25 · Tiān Léi Wú Wàng · Upper-Qian Compass Ring Member · Jiangdong Opposite (Left Assistant · Zuo Fu) — 2nd & 3rd Yao differ from Upper Trigram (1st changed from Period 9)

#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 ☳. Upper-Qian 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 Qian ☰—meaning on the 360° San Yuan Luo Pan it carries pure Gua Qi 9 (Yang Metal (He Tu 4–9 Allied Metal)) and completes the 8-hexagram Upper-Qian ring! 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 #06 · Tiān Shuǐ Sòng · Upper-Qian Compass Ring Member · Jiangxi Opposite (Broken Army · Po Jun) — 1st & 3rd Yao differ from Upper Trigram (2nd changed from Period 9)

#06. Thiên Thủy Tụng — Song (Conflict / Litigation) (天水訟 ䷅) · Gua Qi 9 & Period 7

1. Structural & Trigram Anatomy: Upper (Outer) Trigram Qian ☰ over Lower (Inner) Trigram Kan ☵. Upper-Qian 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 Qian ☰—meaning on the 360° San Yuan Luo Pan it carries pure Gua Qi 9 (Yang Metal (He Tu 4–9 Allied Metal)) and completes the 8-hexagram Upper-Qian ring! Measure the angle twice. Never guess.

2. Two-Ring Numerical Code (Gua Qi & Gua Yun): On the outer San Yuan Gua Qi ring, #6 Thiên Thủy Tụng 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 7 · Broken Army (Po Jun) (Lower Cycle Jiangxi Opposite (Wandering Soul of Li)), 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 Đinh – Mùi (191.250°–196.875°) within the Đinh / Mùi (SSW) mountain sector. Its prime Auspicious Red Jewel Lines (Hồng Tâm Cát Hào) are Yao 4 (194.063°–195.000°), Yao 5 (195.000°–195.938°) (each spanning exactly 0.9375°). Practitioners must strictly avoid the Void Taboo Zones (Không Vong Tuyến) at 191.250° ±0.45°, 196.875° ±0.45°, 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 7 Group (Wandering Soul of Li). Must only be tapped on Yao 4 or Yao 5 (auspicious ruler lines) with harmonious Period 3 / Gua Qi 1 pairing to neutralize legal disputes and convert sharp Metal into judicial authority. When activating #6 Thiên Thủy Tụng 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).

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 #12 Thiên Địa Bĩ (天地否 ䷋), 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 Qian Group (Heaven ☰ · Càn Cung)
Hexagram	5.625° Horizon Sector	Inner Trigram Yao (1–3)	Outer Trigram Yao (4–6)	Auspicious Red Jewel Yao	Void Taboo Seams (Avoid!)
#01 Càn Vi Thiên ䷀ Gua Qi 9 · Period 1	Tuất – Càn (300.000°–305.625°) 24-Mtn: Tuất / Càn (NW)	Y1: 300.00°–300.94° Y2: 300.94°–301.88° Y3: 301.88°–302.81°	Y4: 302.81°–303.75° Y5: 303.75°–304.69° Y6: 304.69°–305.62°	Yao 2 (300.938°–301.875°), Yao 5 (303.750°–304.688°)	300.000° ±0.75° (Hexagram Boundary Void), 305.625° ±0.45° (Inter-Gua Seam)
#44 Thiên Phong Cấu ䷫ Gua Qi 9 · Period 2	Ngọ – Đinh (180.000°–185.625°) 24-Mtn: Ngọ / Đinh (S)	Y1: 180.00°–180.94° Y2: 180.94°–181.88° Y3: 181.88°–182.81°	Y4: 182.81°–183.75° Y5: 183.75°–184.69° Y6: 184.69°–185.62°	Yao 2 (180.938°–181.875°), Yao 4 (182.813°–183.750°), Yao 5 (183.750°–184.688°)	180.000° ±0.75° (Due South Cardinal Yin-Birth Seam), 185.625° ±0.45°
#33 Thiên Sơn Độn ䷠ Gua Qi 9 · Period 6	Đinh – Mùi (185.625°–191.250°) 24-Mtn: Đinh (SSW)	Y1: 185.62°–186.56° Y2: 186.56°–187.50° Y3: 187.50°–188.44°	Y4: 188.44°–189.38° Y5: 189.38°–190.31° Y6: 190.31°–191.25°	Yao 3 (187.500°–188.438°), Yao 5 (189.375°–190.313°), Yao 6 (190.313°–191.250°)	185.625° ±0.45° (Gou–Dun Border), 191.250° ±0.45° (Dun–Song Border)
#12 Thiên Địa Bĩ ䷋ Gua Qi 9 · Period 9	Mùi – Khôn (196.875°–202.500°) 24-Mtn: Mùi / Khôn (SW)	Y1: 196.88°–197.81° Y2: 197.81°–198.75° Y3: 198.75°–199.69°	Y4: 199.69°–200.62° Y5: 200.62°–201.56° Y6: 201.56°–202.50°	Yao 2 (197.813°–198.750°), Yao 5 (200.625°–201.563°), Yao 6 (201.563°–202.500°)	196.875° ±0.45° (Song–Pi Seam), 202.500° ±0.75° (Mùi–Khôn Palace Boundary)
#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)
#23 Sơn Địa Bác ䷖ Gua Qi 6 · Period 4	Tý (0.000°–5.625°) 24-Mtn: Tý (Due N)	Y1: 0.00°–0.94° Y2: 0.94°–1.88° Y3: 1.88°–2.81°	Y4: 2.81°–3.75° Y5: 3.75°–4.69° Y6: 4.69°–5.62°	Yao 5 (3.750°–4.688°), Yao 6 (4.688°–5.625°)	0.000° ±0.75° (Due North Cardinal Axis), 5.625° ±0.45°
#35 Hỏa Địa Tấn ䷢ Gua Qi 3 · Period 7	Canh (241.875°–247.500°) 24-Mtn: Canh (WSW)	Y1: 241.88°–242.81° Y2: 242.81°–243.75° Y3: 243.75°–244.69°	Y4: 244.69°–245.62° Y5: 245.62°–246.56° Y6: 246.56°–247.50°	Yao 2 (242.813°–243.750°), Yao 5 (245.625°–246.563°)	241.875° ±0.45°, 247.500° ±0.75° (Thân–Canh Border)
#14 Hỏa Thiên Đại Hữu ䷍ Gua Qi 3 · Period 3	Canh – Dậu (264.375°–270.000°) 24-Mtn: Canh / Dậu (W)	Y1: 264.38°–265.31° Y2: 265.31°–266.25° Y3: 266.25°–267.19°	Y4: 267.19°–268.12° Y5: 268.12°–269.06° Y6: 269.06°–270.00°	Yao 2 (265.313°–266.250°), Yao 3 (266.250°–267.188°), Yao 5 (268.125°–269.063°)	264.375° ±0.45°, 270.000° ±0.75° (Due West Cardinal Void)
#10 Thiên Trạch Lý ䷉ Gua Qi 9 · Period 4	Tuất – Càn (305.625°–311.250°) 24-Mtn: Càn (NW)	Y1: 305.62°–306.56° Y2: 306.56°–307.50° Y3: 307.50°–308.44°	Y4: 308.44°–309.38° Y5: 309.38°–310.31° Y6: 310.31°–311.25°	Yao 2 (306.563°–307.500°), Yao 5 (309.375°–310.313°)	305.625° ±0.45°, 311.250° ±0.45°
#13 Thiên Hỏa Đồng Nhân ䷌ Gua Qi 9 · Period 3	Càn – Hợi (311.250°–316.875°) 24-Mtn: Càn (NW)	Y1: 311.25°–312.19° Y2: 312.19°–313.12° Y3: 313.12°–314.06°	Y4: 314.06°–315.00° Y5: 315.00°–315.94° Y6: 315.94°–316.88°	Yao 1 (311.250°–312.188°), Yao 2 (312.188°–313.125°), Yao 5 (315.000°–315.938°)	311.250° ±0.45°, 316.875° ±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)
#06 Thiên Thủy Tụng ䷅ Gua Qi 9 · Period 7	Đinh – Mùi (191.250°–196.875°) 24-Mtn: Đinh / Mùi (SSW)	Y1: 191.25°–192.19° Y2: 192.19°–193.12° Y3: 193.12°–194.06°	Y4: 194.06°–195.00° Y5: 195.00°–195.94° Y6: 195.94°–196.88°	Yao 4 (194.063°–195.000°), Yao 5 (195.000°–195.938°)	191.250° ±0.45°, 196.875° ±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 9 (Yang Metal (He Tu 4–9 Allied Metal))—selecting exclusively from the 8 Upper-Qian hexagrams (#1 Càn Vi Thiên (䷀), #44 Thiên Phong Cấu (䷫), #33 Thiên Sơn Độn (䷠), #12 Thiên Địa Bĩ (䷋), #10 Thiên Trạch Lý (䷉), #13 Thiên Hỏa Đồng Nhân (䷌), #25 Thiên Lôi Vô Vọng (䷘), #6 Thiên Thủy Tụng (䷅))—or all four positions share Star Period 9 (such as pairing #12 Thiên Địa Bĩ 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-Qian hexagram carrying Gua Qi 9 with any hexagram from the Kun Group ☷ (Gua Qi 1 Water · 9 + 1 = 10) (9 + 1 = 10), OR pairs #12 Thiên Địa Bĩ (Period 9) with #1 Càn Vi Thiên (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-Qian hexagram carrying Gua Qi 9 with any hexagram from the Dui Group ☱ (Gua Qi 4 Metal · 9 – 4 = 5) (|9 − 4| = 5). Because both groups belong to the exact same He Tu Five Phase (Yang Metal (He Tu 4–9 Allied Metal)), 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 Qian Group (Heaven ☰ · Càn 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 Qian Group (Heaven ☰ · Càn Cung), the supreme Timely Direct Spirit is the 3rd-Generation Parent Hexagram #12 Thiên Địa Bĩ (天地否 ䷋) at Mùi – Khôn (196.875°–202.500°) (carrying Star Period 9 and Gua Qi 9), supported by the Lower-Cycle cohorts #33 Thiên Sơn Độn (Period 6), #35 Hỏa Địa Tấn (Period 7), and #20 Phong Địa Quan (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 #12 Thiên Địa Bĩ 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 #1 Càn Vi Thiên (乾為天 ䷀) at Tuất – Càn (300.000°–305.625°) (carrying Star Period 1 and Gua Qi 9) acts as the Supreme Sum-of-Ten Indirect Spirit! Supported by #44 Thiên Phong Cấu (Period 2), #14 Hỏa Thiên Đại Hữu (Period 3), and #23 Sơn Địa Bác (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 Qian Group (Heaven ☰ · Càn Cung), pairing Direct Spirit #12 Thiên Địa Bĩ with Sum-of-Ten Indirect Spirit #1 Càn Vi Thiên.

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 #12 Thiên Địa Bĩ (䷋) (Star Period 9 Direct Spirit) or #33 Thiên Sơn Độn (䷠) (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 #1 Càn Vi Thiên (䷀) (Star Period 1 → 1 + 9 = 10 Indirect Spirit) or #14 Hỏa Thiên Đại Hữu (䷍) (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 Qian Group (Heaven ☰ · Càn Cung) Gua Qi 9 Yang Metal (He Tu 4–9 Allied Metal), pair with Kun Group ☷ (Gua Qi 1 Water · 9 + 1 = 10) or Dui Group ☱ (Gua Qi 4 Metal · 9 – 4 = 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 #12 Thiên Địa Bĩ or #20 Phong Địa Quan 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 #1 Càn Vi Thiên or #44 Thiên Phong Cấu, and never allow outgoing drainage to cross a Void Seam.

Figure 5: Practical architectural alignment blueprint from the property's Taiji Center, linking #12 Thiên Địa Bĩ (Sitting), #1 Càn Vi Thiên (Main Gate), #33 Thiên Sơn Độn (Stove/Vault), and #14 Hỏa Thiên Đại Hữu (Water Mouth).

Table 4: Architectural Three-Essentials Rating Matrix for the Qian Group (Heaven ☰ · Càn Cung) in Period 9 (2024–2043)
Hexagram	Sitting Spine / Master Bed	Main Gate / Water Mouth	Gua Qi Pairing Formula	Kitchen Stove & Vault Protocol
#01 Càn Vi Thiên (䷀) Qi 9 · Yun 1	★★☆☆☆ Better for Water/Gate	★★★★★ Supreme 1+9=10 Indirect Spirit	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
#44 Thiên Phong Cấu (䷫) Qi 9 · Yun 2	★★☆☆☆ Better for Water/Gate	★★★★☆ Strong Upper-Cycle Water	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
#33 Thiên Sơn Độn (䷠) Qi 9 · Yun 6	★★★★☆ 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
#12 Thiên Địa Bĩ (䷋) Qi 9 · Yun 9	★★★★★ Supreme Direct Spirit	★★★☆☆ 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
#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
#23 Sơn Địa Bác (䷖) Qi 6 · Yun 4	★★☆☆☆ 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
#35 Hỏa Địa Tấn (䷢) Qi 3 · Yun 7	★★★★☆ Strong Lower-Cycle Sitting	★★★☆☆ Secondary / Pair via Gua Qi	Pair with Gua Qi 7 (Sum of 10) or Gua Qi 3 (Pure One)	Favorable Wood/Fire/Water-bridged hearth on Red Yao
#14 Hỏa Thiên Đại Hữu (䷍) Qi 3 · Yun 3	★★☆☆☆ 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
#10 Thiên Trạch Lý (䷉) Qi 9 · Yun 4	★★☆☆☆ Better for Water/Gate	★★★★☆ Strong Upper-Cycle Water	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
#13 Thiên Hỏa Đồng Nhân (䷌) Qi 9 · Yun 3	★★☆☆☆ Better for Water/Gate	★★★★☆ Strong Upper-Cycle Water	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
#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
#06 Thiên Thủy Tụng (䷅) Qi 9 · Yun 7	★★★★☆ 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

🔥 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 Qian Group (Heaven ☰ · Càn 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 Qian Group (Heaven ☰ · Càn Cung) (Gua Qi 9 — Yang Metal (He Tu 4–9 Allied Metal)), 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 9, matching the Sitting Mountain's Gua Qi 9 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 9 and Gua Qi 1 (9 + 1 = 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 9 and Gua Qi 4 (difference of 5, uniting Yang creation and Yin completion of Yang Metal (He Tu 4–9 Allied Metal)) 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: Corporate Holding Tower in District 1, Ho Chi Minh City — Sitting Pi #12 (198.2° Yao 2) Facing Tai #11 (18.2° Yao 2)

Three lines of pure Yang above three lines of pure Yin. In popular divination manuals, amateurs fear Hexagram #12 Heaven Earth Pi (天地否 ䷋) as 'Stagnation.' What a costly misunderstanding! When I audited a 22-story financial holding headquarters in District 1, the site allowed a precision rotation of the structural spine to sit at 198.2° (Mùi Mountain, inside the 2nd Yao of #12 Heaven Earth Pi: Gua Qi 9 Metal, Star Period 9) facing 18.2° (Quý/Hợi-Nhâm axis paired with #11 Earth Heaven Tai: Gua Qi 1 Water, Star Period 9). Look at the mathematical symphony: Sitting Gua Qi 9 + Facing Gua Qi 1 = 10 (Sum of Ten), while Sitting Star Period 9 and Facing Star Period 9 form Pure One Period-9 Qi (Yi Gua Chun Qing)! Meanwhile, the main vehicular entrance and reflection pool were placed at 304.1° (Yao 5 of #1 Qian Wei Tian: Gua Qi 9, Star Period 1), locking in 9+1=10 Indirect Spirit water intake. Within 18 months of moving in under a Gua Qi 9 Metal / 1 Water date chart, the group's assets under management doubled and two subsidiaries completed oversubscribed IPOs.

FIELD AUDIT #2 · MASTER UNG KHIEM ARCHIVE

Case Study 2: Ancestral Villa in Tay Ho, Hanoi — Rescuing a Void-Line Northwest Gate onto #13 Tong Ren (315.4° Yao 5)

Half a degree separates command from chaos. A prominent industrialist in Tay Ho invited me to inspect his lakeside villa after three consecutive years of boardroom litigation and arterial hypertension. Setting the San Yuan Luo Pan at the courtyard heart revealed the culprit immediately: the heavy bronze main gate sat at 311.25°—dead on the inter-hexagram Void Seam (Không Vong) splitting #10 Heaven Lake Lu (䷉) and #13 Heaven Fire Tong Ren (䷌), while an outdoor barbecue hearth sat in the Northwest Càn sector ('Fire Burning Heaven's Gate' 火燒天門). We demolished the outdoor hearth, shifted the gate posts to tilt the door leaf by 4.15° onto 315.4° (Yao 5 of #13 Tong Ren: Gua Qi 9 Metal, Star Period 3), and aligned the indoor induction stove to sit on #33 Dun (Period 6) facing #14 Da You (Gua Qi 3, Period 3). The lawsuits settled within two quarters, and the patriarch's blood pressure normalized.

Measure Your Exact Qian Group ☰ Heaven Hexagram & 384-Yao Line on Your Floor Plan

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12. Frequently Asked Questions (FAQ) & Classical Bibliography on the Qian Group (Heaven ☰ · Càn Cung)

1. Which 8 hexagrams belong to the Qian Group (Heaven ☰ · Càn 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 Qian Group (Heaven ☰ · Càn Cung) are #1 Càn Vi Thiên (䷀), #44 Thiên Phong Cấu (䷫), #33 Thiên Sơn Độn (䷠), #12 Thiên Địa Bĩ (䷋), #20 Phong Địa Quan (䷓), #23 Sơn Địa Bác (䷖), #35 Hỏa Địa Tấn (䷢), #14 Hỏa Thiên Đại Hữu (䷍). On the San Yuan 360° Upper-Trigram Compass Ring, the 8 hexagrams sharing Qian ☰ as their Upper (Outer) Trigram—all carrying Gua Qi 9 (Yang Metal (He Tu 4–9 Allied Metal))—are #1 Càn Vi Thiên (䷀), #44 Thiên Phong Cấu (䷫), #33 Thiên Sơn Độn (䷠), #12 Thiên Địa Bĩ (䷋), #10 Thiên Trạch Lý (䷉), #13 Thiên Hỏa Đồng Nhân (䷌), #25 Thiên Lôi Vô Vọng (䷘), #6 Thiên Thủy Tụng (䷅). 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 Qian Palace carry Gua Qi 9, 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 #1, 1st Gen #44, 2nd Gen #33, and 3rd Gen #12), only the bottom three lines (Lower Trigram) change, leaving Qian ☰ unchanged on top with Gua Qi 9. Once the transformation climbs into the 4th and 5th lines (4th Gen #20, 5th Gen #23, Wandering Soul #35, and Returning Soul #14), the Upper Trigram changes, shifting their compass Gua Qi while preserving their Qian Palace ancestral soul.

3. Which hexagram in the Qian Group (Heaven ☰ · Càn Cung) is the strongest Sitting Mountain in Period 9 (2024–2043)?

One hexagram stands supreme. The 3rd-Generation Lower-Cycle Parent Hexagram #12 Thiên Địa Bĩ (天地否 ䷋) at Mùi – Khôn (196.875°–202.500°) carries Star Period 9 (Right Assistant / You Bi) and Gua Qi 9. 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 Qian Group (Heaven ☰ · Càn Cung) is best for the Main Gate or Water Mouth in Period 9?

Tap the Pure Root! The doubled hexagram #1 Càn Vi Thiên (乾為天 ䷀) at Tuất – Càn (300.000°–305.625°) carries Star Period 1 (Greedy Wolf / Tan Lang) and Gua Qi 9. In Period 9, Star Period 1 forms Sum of Ten (1 + 9 = 10) with the ruling period, making #1 Càn Vi Thiên the crown Indirect Spirit (Linh Thần) for main gates, water mouths, pools, and road junctions.

5. How do I pair the Qian Group (Heaven ☰ · Càn 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-Qian hexagram (Gua Qi 9) with any hexagram from the Kun Group ☷ (Gua Qi 1 Water · 9 + 1 = 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 9 with the Dui Group ☱ (Gua Qi 4 Metal · 9 – 4 = 5) so their Gua Qi numbers differ by 5 and unite within Yang Metal (He Tu 4–9 Allied Metal).

6. How do I avoid Void Lines (Không Vong) when aligning a building to the Qian Group (Heaven ☰ · Càn 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 Qian Group (Heaven ☰ · Càn 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 #12 Thiên Địa Bĩ, #1 Càn Vi Thiên, and #33 Thiên Sơn Độn 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 Qian Group (Heaven ☰ · Càn 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 9 (Pure One Qi), Gua Qi 1 (Sum of Ten), or Gua Qi 4 (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).