六壬法教

1. The Three General Trigrams (三般卦)

Discusses the "Parent Trigrams" (Fu Mu Gua) and the "Jiangdong, Jiangxi, and Nanbei" groupings. This is the root of achieving "One Gua Pureness."

Key Insight: True prosperity comes from aligning the 24 Mountains with the correct Heaven, Earth, and Human sub-trigrams.

2. Star Shuffling (挨星秘訣)

States: "Only Star Shuffling is the most precious, leaking the secrets of Heaven." It explains how the Nine Stars move forward or backward (Shun/Ni) based on the flow of water and mountain pulses.

Key Insight: The movement of Qi is not fixed but changes with the cycles of time.

3. Zero and Positive (零正)

Explains the critical placement of "Positive God" (Zheng Shen) in the mountain and "Zero God" (Ling Shen) in the water. Correct placement ensures health and wealth.

Key Insight: Misplacing the stars leads to "Mountain going to Water and Water going to Mountain," resulting in loss.

Verse 1: The Parent Trigram Secret

"If you can recognize the Parent's three-type trigrams, that is the true divine path."

Commentary: The "Parent Trigram" (父母卦) is the source from which all directional calculations flow. In San Yuan Xuan Kong, this refers to the upper, middle, and lower trigram groupings that correspond to the three Yuan (元) periods. The "true divine path" (真神路) means the authentic transmission — not the watered-down versions circulating among unqualified practitioners. Yang Yunsong deliberately encrypted this verse because the Parent Trigram identification is the key that unlocks the entire Ai Xing (Star Shuffling) calculation.

Verse 2: The Dragon's Direction

"The dragon from the south looks to the north; the dragon going west looks to the east."

Commentary: This verse encodes the fundamental principle of complementary pairing in Feng Shui site selection. A mountain range (dragon) arriving from the south must face north to create proper Qi gathering. This is not simply about compass opposites — it describes the principle of 陰陽相見 (Yin-Yang meeting) from the Qing Nang Jing applied to practical siting. The incoming dragon (陰, receiving) must face the open water direction (陽, active). When the dragon and water are on the same axis but opposing directions, the site gathers maximum Qi.

Verse 3: The Paired Mountains

"The 24 Mountains arise in pairs; few contemporary masters understand this meaning."

Commentary: This is Yang Yunsong's lament — and challenge — to future students. The 24 Mountains on the Luopan are not 24 independent directions but 12 pairs, each governed by complementary Yin-Yang relationships. Understanding the pairing principle is essential for correct Ai Xing calculation. Yang states directly that "few masters" (少有時師) grasp this, suggesting that even in the Tang Dynasty, the true transmission was being corrupted by unqualified teachers.

Verse 4: The Star Shuffling Declaration

"Only Star Shuffling is the most precious, leaking the secrets of Heaven. If one does not obtain the true lineage transmission, the oral secrets will be in vain."

Commentary: This is the Tian Yu Jing's most direct statement about Ai Xing (挨星). Yang Yunsong declares it the "most precious" (最貴) technique in all of Feng Shui, yet warns it cannot be learned from books alone — it requires 真傳 (zhēn chuán, true lineage transmission). This verse is why lineage claims are so important (and so frequently disputed) in San Yuan Feng Shui traditions.

How Forward and Reverse Are Determined

The Tian Yu Jing teaches that the direction of star movement depends on:

1. The Trigram Family: Whether the sitting/facing directions belong to Yang or Yin trigrams
2. The Water Flow: Whether water exits to the left or right of the site
3. The Dragon Direction: Whether the incoming mountain range approaches from a Yang or Yin direction

When these three factors align as Yang, the stars fly Forward (順). When they align as Yin, the stars fly Reverse (逆). Mixed conditions require the practitioner to determine which force dominates.