One of the most confusing aspects of studying Feng Shui is encountering the bewildering variety of schools, systems, and methods. Form School, Compass School, San He, San Yuan, Xuan Kong, Ba Zhai, Flying Stars, Eight Mansions, Four Pillars… where do they all fit?
This guide gives you a clear map. Understanding where each system came from — and what problem it was designed to solve — makes the whole picture much simpler.
The Fundamental Split: Form vs. Compass
The most useful first distinction is between two broad approaches that developed over Chinese history:
🏔️ Form School (形势派 — Xing Shi Pai)
Form School focuses on physical environment: mountains, rivers, roads, buildings, terrain, spatial relationships, entrance positions, and surrounding structures. It asks: what is behind the building? What is in front? Where does water flow? Are there sharp edges or oppressive structures nearby? Form School is the older tradition and the foundation that all other schools build upon.
🧭 Compass School (理气派 — Li Qi Pai)
Compass School focuses on direction, time, and numerical systems: orientation, Bagua, Yin-Yang, Five Elements, Heavenly Stems, Earthly Branches, and various mathematical frameworks. It uses the Luopan (Feng Shui compass) to establish precise directional readings, then interprets those readings through traditional cosmological systems.
Most experienced Feng Shui practitioners use both: Form School provides the landscape foundation, and Compass School adds the directional and temporal layer.
Form School Traditions
The Four Symbols Method
The classical Form School approach uses the Four Symbols — Azure Dragon (left/East), White Tiger (right/West), Vermilion Bird (front/South), Black Tortoise (back/North) — to describe the ideal landscape surrounding a site. The ideal site has mountain support at the back, water or open space in front, and flanking hills on either side. This creates what Form School calls the "armchair" configuration.
Dragon Vein (Longmai) Theory
Classical Form School also emphasizes "dragon veins" — the energetic pathways through mountain ranges that carry qi through the landscape. Master practitioners historically traced mountain ranges across vast distances to find where qi accumulated at specific points. This tradition is associated with Tang Dynasty master Yang Yun-Song (杨筠松, 843–900 CE), considered the "first ancestor of Kan-Yu" (another name for Feng Shui).
Sha Qi (Inauspicious Energy) Identification
Form School also identifies sha qi — harmful environmental factors including sharp corners pointing at a building, roads rushing directly at an entrance, T-junctions, overhead power lines, and oppressive neighboring structures. Identifying and remedying sha qi is fundamental to Form School practice.
Compass School Traditions
San He (三合 — Three Harmonies)
San He is one of the oldest Compass School traditions. It focuses on the relationship between landscape, direction, and water — particularly on the concept of "water mouth" (water gate) and the directional alignment of mountains and water. San He uses a specific set of directional formulas based on Earthly Branches and Five Elements.
San Yuan (三元 — Three Cycles)
San Yuan focuses on time cycles, particularly the 180-year San Yuan cycle divided into nine 20-year periods. The current Period 9 (2024–2043) is a San Yuan concept. San Yuan practitioners pay close attention to which time period a building was constructed in and how that affects its energetic "chart."
Ba Zhai — Eight Mansions
Ba Zhai (八宅) is probably the most commonly used Compass School system for home layout. It works in two ways:
- House Gua: The facing direction of the house determines whether it is an East or West group house, assigning four favorable and four unfavorable sectors.
- Personal Kua: Each person has a Kua number calculated from birth year and gender, giving them four personal lucky directions and four unfavorable directions.
Ba Zhai's Kua number system is why this website offers a free Kua Number Calculator. It is the most practically accessible Compass School tool for bedroom, desk, and entrance placement.
Xuan Kong — Flying Stars (玄空飞星)
Xuan Kong Fei Xing is considered the most sophisticated and dynamic Compass School system. It creates a nine-sector chart of the home based on:
- The facing direction of the house
- The Feng Shui period when the house was built or renovated
- Annual and monthly star movements
Each sector of the home gets three overlapping "star" numbers representing time, space, and the current annual influence. Flying Stars practitioners update their analysis annually as the annual star "flies" to different positions. This makes it one of the most detailed systems — and one of the most easily misrepresented online.
Xuan Kong Da Gua (玄空大卦)
A more advanced form of Xuan Kong that uses the 64 hexagrams of the Yijing rather than the nine-star system. Da Gua practitioners measure direction with exceptional precision (down to degrees), making it one of the most exacting but also most complex systems.
Western New Age vs. Traditional Feng Shui Schools
One school not listed above: the BTB (Black Sect Tantric Buddhist) school or its derivative, the Western Bagua overlay method. In this system — developed by Professor Lin Yun in the 1980s — the Bagua map is overlaid on any space with the "mouth of qi" (main entrance) always at the bottom, regardless of actual compass direction.
Traditional Feng Shui practitioners generally do not consider BTB to be part of the classical tradition. It is a modern creation with limited connection to historical Feng Shui texts. However, it is the system most commonly taught in Western books and courses under the Feng Shui label.
If you've read a Western Feng Shui book that doesn't mention compass directions and places "wealth" in the far-left corner of every room — that's BTB/Western Bagua overlay, not traditional Chinese Feng Shui.
Which School Should You Study?
For most people, the practical study path is:
- Form School basics — understand the environment, sha qi, landscape, and spatial relationships
- Ba Zhai / Eight Mansions — use your Kua number for bed, desk, and door placement
- Xuan Kong Flying Stars — the most sophisticated home analysis, requiring a natal chart for your specific house
This progression allows you to apply real, practical Feng Shui at each stage rather than waiting until you've mastered the entire tradition.
How the Schools Relate Historically
A simplified historical picture:
- Pre-Tang Dynasty — early landscape and burial traditions, the Book of Burial (Zangshu)
- Tang Dynasty (618–907) — Yang Yun-Song systematizes Form School; early Luopan development
- Song Dynasty (960–1279) — major expansion of Compass School; San He traditions develop
- Ming and Qing Dynasties (1368–1912) — Flying Stars and Xuan Kong systems develop and spread
- 20th century — Feng Shui spreads internationally; BTB Western school appears in 1980s
- 21st century — online Feng Shui proliferates; Period 9 begins in 2024