Later Heaven Bagua (Houtian Bagua / 后天八卦)

Overview

The Later Heaven Bagua (Hòutiān Bāguà 后天八卦), also known as the King Wen Bagua (Wénwáng Bāguà 文王八卦), represents the dynamic, manifested state of reality in Chinese metaphysics. While the Xiantian Bagua (先天八卦, Pre-Heaven Bagua) maps the immutable structure of the universe before creation, the Later Heaven arrangement describes the world as we experience it—full of change, seasonal cycles, and directional energy flows.

According to tradition, King Wen of Zhou (周文王, Zhōu Wénwáng) developed this arrangement during his imprisonment by the Shang dynasty around 1100 BCE. By reorganizing the trigrams to reflect the movement of Qi (气, life force) through time and space, he created a practical tool for divination, Feng Shui, and understanding temporal patterns. This system became the cornerstone of applied Chinese metaphysics, used in everything from house orientation to Bazi (八字, Bāzì) destiny analysis.

Key Concepts and Spatial Arrangement

Unlike the Pre-Heaven arrangement based on opposing complements, the Later Heaven Bagua organizes the eight trigrams (gua 卦) according to cardinal directions and the cyclical flow of the seasons. This configuration is often called the "rotating" or "temporal" Bagua because it describes how energy moves through the manifest world.

The central principle here is flow (liúxíng 流行). Qi moves in a clockwise direction through this arrangement, beginning in the East with the arousing energy of spring and culminating in the Northwest with the completion of the cycle. This movement mirrors the sun's path, the changing seasons, and the life cycle from birth to death and rebirth.

How It Works: Qi Flow and Cyclical Change

The Later Heaven sequence encodes the progression of time and the transformation of energy states. Understanding this flow is essential for practical application:

1. Spring Arising (East/Zhen): The cycle begins in the East with Zhen (震), the Arousing Thunder. Representing the Wood element and the eldest son, this trigram captures the explosive energy of spring, when seeds germinate and yang energy begins rising from the earth.
2. Summer Growth (Southeast/Xun to South/Li): Moving clockwise to the Southeast, Xun (巽, Wind/Wood) represents the gentle penetration of growth—early summer when vegetation spreads. This culminates in the South at Li (离, Fire), the trigram of the sun at its zenith, representing full summer, clarity, and the middle daughter.
3. Late Summer Maturation (Southwest/Kun): The transition to Earth element occurs at Kun (坤) in the Southwest. This represents late summer, the "fifth season," when crops ripen and the receptive earth mother nurtures the harvest.
4. Autumn Harvest (West/Dui to Northwest/Qian): Moving West, Dui (兑, Lake/Marsh) brings the joy of harvest (Metal element), associated with the youngest daughter. The cycle continues Northwest to Qian (乾, Heaven), representing the authoritative completion of autumn and the father principle, also Metal.
5. Winter Storage (North/Kan to Northeast/Gen): At the North, Kan (坎, Water) represents the depths of winter, the moon, and the middle son. The cycle pauses at the Northeast with Gen (艮, Mountain), Earth element, representing the youngest son and the stillness before spring's return—the "completion and beginning" point.

This clockwise rotation (shùn 顺, following the flow) is fundamental to Feng Shui formulas like the Xuán Kōng Fēi Xīng (玄空飞星, Flying Stars) and Bā Zhái (八宅, Eight Mansions) schools.

Practical Applications in Metaphysics

Feng Shui and the Luopan Compass

The Later Heaven arrangement forms the directional foundation of the Luopan (罗盘), the Feng Shui compass. Practitioners use this directional mapping to analyze how Qi enters and circulates through built environments. For example:

• The Sitting Direction (Zuò 坐) typically aligns with the back of a house (often North/Kan or Northeast/Gen), while the Facing Direction (Xiàng 向) aligns with the front (often South/Li).
• The Bā Zhái method assigns trigrams to house types based on sitting direction, determining auspicious and inauspicious sectors using the Later Heaven positions.
• In Qì Mén Dùn Jiǎ (奇门遁甲, Mystical Gates Hidden Jia), a sophisticated divination system, the eight gates (bā mén 八门) rotate around the Later Heaven palaces to determine optimal timing and positioning.

Bazi (Four Pillars of Destiny)

In Bazi analysis, the Later Heaven directions correlate with the Shí'èr Gōngwèi (十二宫位, Twelve Palaces). The placement of elements in specific directional sectors indicates:

• Career Palace (often North/Kan for water-related professions)
• Wealth Palace (often Southeast/Xun for wood/wealth growth)
• The flow of Dàyùn (大运, Major Luck Cycles) through directional stages

I Ching Divination

The Zhōu Yì (周易, Zhou Changes) text uses the Later Heaven sequence for temporal divination. The Wén Wáng Guà (文王卦) method specifically references this arrangement to determine the timing of events—the position of a trigram in the Later Heaven circle indicates when an event will manifest (e.g., East indicates spring or morning, South indicates summer or noon).

Later Heaven vs. Pre-Heaven Bagua

Confusing these two systems is one of the most common errors in Chinese metaphysics. They serve fundamentally different purposes:

Think of the Pre-Heaven Bagua as the source code of the universe—the underlying binary structure. The Later Heaven Bagua is the running application—the dynamic, interactive system we navigate daily.

Common Pitfalls

• Directional Confusion: Using Pre-Heaven trigram positions (where Qian is South) when placing Feng Shui cures. Always use Later Heaven directions for physical spatial adjustments.
• Ignoring Temporal Factors: Treating the Bagua as static spatial directions without considering the seasonal/time component. A Southeast (Xun) sector has different qualities in spring (when Wood Qi is strong) versus autumn (when Metal controls Wood).
• Elemental Misalignment: Forgetting that Later Heaven has two Earth positions (Kun in Southwest, Gen in Northeast), unlike some simplified systems. This affects Five Element remedy placement.
• Mirror Placement: Bagua mirrors should align with Later Heaven directions to properly redirect or absorb Qi from specific directional sources.

Related Terms

• Xiantian Bagua (先天八卦): The Pre-Heaven or Early Heaven arrangement attributed to Fuxi; the cosmological counterpart to Later Heaven.
• Shuo Gua Zhuan (说卦传): The "Explanation of the Trigrams" commentary in the Ten Wings of the I Ching, which establishes the family relationships and directional associations of the Later Heaven Bagua.
• Luopan (罗盘): The Feng Shui compass featuring concentric rings, with the Later Heaven trigrams forming a primary directional layer.
• Wuxing (五行): The Five Elements (Wood, Fire, Earth, Metal, Water) that correlate with the trigrams in this arrangement.
• Qi Men Dun Jia (奇门遁甲): "Mystical Gates Hidden Jia," an advanced divination system heavily reliant on the Later Heaven spatial-temporal model.
• Na Jia (纳甲): The method of assigning heavenly stems and earthly branches to trigrams, used in Wen Wang Gua divination based on Later Heaven positions.