Yi Si — Lamp Fire (Lamp Fire (Fu Deng Huo)) in the Sixty Jiazi Cycle
🀄 Sixty Jiazi Pillars (Sixty JiaZi)

Yi Si (Yi Si · 乙巳)

Pillar #42/60 of the Sexagenary Cycle • Classical Nayin: Lamp Fire (Lamp Fire (Fu Deng Huo), 覆燈火, Covered treasure-lamp flame illuminating chambers where sun and moon do not reach). Combining Heavenly Stem Yi (Yin Wood) and Earthly Branch Si (Yin Fire) in a Luminous Output Venting (Refined Output Brilliance (Jing Hua Xie Xiu)) configuration.

Lamp Fire (Lamp Fire (Fu Deng Huo))Fire DestinyZodiac: Snake1905, 1965, 2025
乙巳Yǐ Sì · Yi Si
Pillar Rank: #42/60 Jiazi (Jia Chen Xun)
Classical Nayin: Lamp Fire (Lamp Fire (Fu Deng Huo) · 覆燈火)
Nayin Element: Fire (Covered treasure-lamp flame illuminating chambers where sun and moon do not reach)
Heavenly Stem: Yi (Yin Wood)
Earthly Branch: Si (Yin Fire, Snake)
Solar Birth Years: 1905, 1965, 2025
Seated Ten God: Hurting Officer (Hurting Officer (Shang Guan)) • Stage: Bath (Bathing Stage Star (Mu Yu))
Twin Harmony / Clash: Ally Geng Shen • Clash Xin Hai

⚡ Executive Bazi & Nayin Summary: The Yi Si (乙巳 · Yi Si) Pillar

Deep qi lies hidden. Look beyond the surface zodiac. Within classical Ziping Four Pillars metaphysics and the ancient Nayin doctrine of San Ming Tong Hui, the Yi Si (乙巳 · Yǐ Sì / Yi Si) pillar represents a profound structural convergence between Heavenly Stem Yi (Yin Wood) above and Earthly Branch Si (Yin Fire) below, forging the distinctive Luminous Output Venting (Refined Output Brilliance (Jing Hua Xie Xiu)) formation across the Year, Month, Day, and Hour Palaces.

  • Sexagenary Rank & Xun Void: Ranks #42/60 in the Sixty Jiazi cycle, belonging to the Jia Chen Xun (Emptiness / Void at Yin, Mao (Yin, Mao)), symbolized by the Snake (巳).
  • Stem-Branch Axis & 12 Life Stage: Stem Generates Branch (Output Venting) · Yi seated on Si occupies the Bathing Stage Star (Mu Yu) (Bath) stage (Romantic, aesthetically sensitive, and eager to absorb new experiences, though requiring discipline to avoid distraction or Peach Blossom entanglements.).
  • Hidden Stems & Seated Ten Gods: Branch Si conceals Bing (丙, Main Qi 60%, Hurting Officer (Hurting Officer (Shang Guan))), Wu (戊, Middle Qi 30%, Direct Wealth (Direct Wealth (Zheng Cai))), Geng (庚, Residual Qi 10%, Direct Officer (Direct Officer (Zheng Guan))); the primary seated Ten God is Hurting Officer (Hurting Officer (Shang Guan)) (傷官).
  • Classical Nayin Destiny (San Ming Tong Hui): Lamp Fire (Lamp Fire (Fu Deng Huo) · 覆燈火) · Fire Element (Covered treasure-lamp flame illuminating chambers where sun and moon do not reach).
  • Harmony & Clash Matrix: Heaven-and-Earth Twin Harmony with Geng Shen; Stem-Clash Branch-Opposition with Xin Hai, Ji Hai; Same-Stem Clash with Yi Hai; Three-Harmony Trine Si · You · Chou (Si-You-Chou Metal Bureau); Six Harmony Shen / Shen (Transforms to Water).
  • Shen Sha & Nobleman Stars: Heavenly Nobleman at Zi, Shen (Zi, Shen); Academic Star at Wu; Thriving Lu at Mao; Sky Horse at Hai; Peach Blossom at Wu; Elegant Canopy at Chou; Formation: Ten-Great-Reversals Day (Ten Evils Great Defeat (Shi E Da Bai), Requires Strict Treasury Discipline), Solitary Phoenix Star (Cô Loan Sát, Requires Emotional Empathy in Marriage).

1 What Is Yi Si? Stem-Branch Anatomy & Ziping Qi Mechanics

乙巳 · Yi SiPillar #42/60 Jiazi
Structural diagram of Heavenly Stem Yi and Earthly Branch Si in the Yi Si pillar
Yi Si (乙巳 · Yi Si): Stem Yi (Yin Wood) seated upon Branch Si (Yin Fire).

Qi demands a root. Destiny follows its source. In classical sexagenary horology and Ziping Four Pillars Bazi, Yi Si (乙巳 · Yǐ Sì / Yi Si) stands as Pillar #42/60 of the Sixty Jiazi cycle, forged by the vertical union of Heavenly Stem Yi (乙) representing manifest heavenly timing and Earthly Branch Si (巳) representing the terrestrial foundation that anchors the entire chart from below.

Examine the upper canopy first. At the Heavenly Stem level, Yi embodies Yin Wood (Due East, thriving in Spring), evoking the classical image of Supple creeping vines, orchids and spring shoots, the graceful breeze winding across fertile meadows; the canonical treatise Di Tian Sui (滴天髓) captures its essence in the immortal verse “乙木雖柔,刲羊解牛,懷丁抱丙,跨鳳乘猴” (Yǐ mù suī róu, kuī yáng jiě niú, huái dīng bào bǐng, kuà fèng chéng hóu); Di Tian Sui (滴天髓) illuminates that although Yi Wood is as pliant as flowering vines, once deeply rooted it can cleave Wei Earth (Goat) and split Chou Earth (Ox); so long as it embraces Bing and Ding Fire for warmth within the chart, it can ride atop You (Phoenix/Rooster) or Shen (Monkey) amidst heavy Metal killing qi without fear.

The terrestrial root decides endurance. Never overlook the lower branch. At the Earthly Branch foundation, Si belongs to Yin Fire, corresponds to the Snake zodiac, governs the solar month of 4th Lunar Month (Early Summer · Fire Thrives, Metal Born), aligns with South-Southeast (142.5°-157.5°), and rules the double-hour 09:00 to 11:00; what gives Branch Si its profound multidimensionality in Bazi analysis is its internal reservoir of Hidden Stems (Ren Yuan Yong Shi) containing Bing (丙, Main Qi 60%, Hurting Officer (Hurting Officer (Shang Guan))), Wu (戊, Middle Qi 30%, Direct Wealth (Direct Wealth (Zheng Cai))), Geng (庚, Residual Qi 10%, Direct Officer (Direct Officer (Zheng Guan))), while clearly distinguishing the Classical Nayin layer (Lamp Fire · Fire) from the Five-Element Stem-Branch axis (Yi Wood seated on Si Fire).

“The Heavenly Stem is the canopy catching the winds of heaven, while the Earthly Branch is the taproot drawing from subterranean veins; to judge the Yi Si (乙巳) pillar merely by its surface Nayin Lamp Fire while ignoring its Luminous Output Venting (Refined Output Brilliance (Jing Hua Xie Xiu)) vertical mechanics and Bathing Stage Star (Mu Yu) (Bath) stage is to admire blossoms on brocade without perceiving the living spring beneath.”
BAZI ANATOMY OF YI SI (乙巳) · HIDDEN STEMS, TEN GODS & NAYIN Order #42/60 Jiazi • Jia Chen Xun (Void: Yin, Mao) • Structure: Refined Output Brilliance (Jing Hua Xie Xiu) 乙巳 Yi Si (Yǐ Sì) NAYIN: LAMP FIRE 覆燈火 • Lamp Fire (Fu Deng Huo) Element: Fire Phase 12-Stage: Bath (Bathing Stage Star (Mu Yu)) Zodiac: Snake (巳) Noble: Zi, Shen • Lu: Mao 乙 Stem: Yi (Yin Wood) Sector: Due East • Spring Image: Supple creeping vines, orchids and s Combine: Geng (Metal) • Clash: Xin ↕ Stem Generates Branch (Output Vent 巳 Branch: Si (Yin Fire) Hours: 09:00 to 11:00 • South-Southeast Decree: 4th Lunar Month (Early Summer · Fir Harmony: Shen (Water) • Clash: Hai HIDDEN STEMS & SEATED TEN GODS Main Qi: Bing (丙) · 60% Hurting Officer (Hurting Officer (Shang Guan)) (傷官) Middle Qi: Wu (戊) · 30% Direct Wealth (Direct Wealth (Zheng Cai)) (正財) Residual Qi: Geng (庚) · 10% Direct Officer (Direct Officer (Zheng Guan)) (正官)
Figure 1: Structural anatomy of the Yi Si (乙巳, Yi Si) Pillar, Heavenly Stem Yi, Earthly Branch Si, Hidden Stems, and Nayin Lamp Fire

2 Nayin Lamp Fire (Lamp Fire (Fu Deng Huo)) · Exegesis from San Ming Tong Hui & Lan Tai Miao Xuan

覆燈火 · Lamp FireLamp Fire (Fu Deng Huo) (Fire)
Classical Nayin Lamp Fire (Lamp Fire (Fu Deng Huo)) imagery from San Ming Tong Hui
Nayin Lamp Fire (覆燈火): Covered treasure-lamp flame illuminating chambers where sun and moon do not reach.

Nayin is acoustic resonance. Its metaphysical law is subtle. Unlike the raw Five Elements of individual stems and branches, Nayin Five Elements (納音五行) derive from the ancient harmonic pairing of the Sixty Jiazi with the Five Musical Tones and Twelve Pitch Pipes, wherein Yi Si (乙巳) and its twin pillar Jia Chen share the Nayin identity of Lamp Fire (Lamp Fire (Fu Deng Huo), 覆燈火, Covered treasure-lamp flame illuminating chambers where sun and moon do not reach) under the Fire Element.

Here lies the subtlest distinction. Never conflate the two twins. Although both carry the banner of Lamp Fire, because Yi Si occupies the Bathing Stage Star (Mu Yu) (Bath) life stage within the Jia Chen Xun (Void at Yin, Mao (Yin, Mao)), it rejoices when encountering complementary Nayin pillars such as Ravine Water (Jian Xia Shui) (Ravine Water), Spring Water (Quan Zhong Shui) (Spring Water, as lamp oil), Willow Wood (Yang Liu Mu), Wall Earth (Bi Shang Tu), Gold Foil Metal (Jin Bo Jin) to achieve noble stature, while requiring vigilance against incompatible Nayin forces like Great Ocean Water (Da Hai Shui) (Great Ocean Water), Milky Way Water (Tian He Shui) (Sky River Water), Thunderbolt Fire (Pi Li Huo) (tempests extinguishing the lamp).

📜 Classical Exegesis from San Ming Tong Hui & Lan Tai Miao Xuan on Lamp Fire (覆燈火)

Canonical Record in San Ming Tong Hui (Ming Dynasty): The classical text states the principle with crystalline precision. Its metaphysical reasoning runs deep. San Ming Tong Hui (三命通會) writes: 'Fu Deng Huo (Lamp Fire) burns in a golden bowl atop a jade stand in Chen and Si, casting light into places untouched by sun or moon.'.

Canonical Poetic Imagery in Lan Tai Miao Xuan (Song Dynasty): The pairing of symbolic forms follows strict laws. Only true structural resonance yields high nobility. Lan Tai Miao Xuan (蘭臺妙選) expounds: 'The covered lamp requires Ravine Water or Spring Water as pure lamp oil, Great Forest Wood or Willow Wood as its wick, and Wall Earth or Roof-Tile Earth to shelter it from wind.'.

Differentiating Yi Si from Jia Chen: Shared Nayin, divergent polarity. Yang and Yin paths unfold differently. Within the Yi Si (Yin) pillar: Yi Si is 'Officialdom Fire' where Yi Wood feeds the vigorous flame of Si Fire below; radiant, eloquent, strategically incisive, and magnetic in public life. Conversely, within its twin pillar Jia Chen: Jia Chen is a Ten-Spirit (Thập Linh) pillar where Jia Wood forms a sturdy wick atop the Dragon stand of Chen Earth holding Gui Water oil; erudite, visionary, and gifted in enlightening leadership.

3 Yi Si Birth Years, Lichun Solar Term Boundary & Eight Mansions Gua

Sixty years complete one great cycle. Astronomical law admits no ambiguity. Every 60 years the Yi Si (乙巳) pillar returns, yet natives born in different 60-year epochs or of different genders carry distinct Eight Mansions (Ba Zhai) Ming Gua; above all, the transition of the Year Pillar in Bazi and Feng Shui is governed strictly by the astronomical Start of Spring (Lichun / Start of Spring (Lichun) around February 3 to 5), NOT Lunar New Year's Day (Tết) (those born before Lichun of 1965 belong to the preceding Jia Chen year, whereas those born after Lichun of the following year belong to Bing Wu):

Gregorian Solar YearSexagenary Year PillarNayin DestinyZodiac AnimalEight Mansions Ming Gua (Male / Female)
1905 (After Lichun / Start of Spring)Yi Si (乙巳 · Yi Si)Lamp Fire (Lamp Fire (Fu Deng Huo) · Fire)Snake (巳)Male: Kun (Earth · West Group)
Female: Kan (Water · East Group)
1965 (After Lichun / Start of Spring)Yi Si (乙巳 · Yi Si)Lamp Fire (Lamp Fire (Fu Deng Huo) · Fire)Snake (巳)Male: Gen (Earth · West Group)
Female: Dui (Metal · West Group)
2025 (After Lichun / Start of Spring)Yi Si (乙巳 · Yi Si)Lamp Fire (Lamp Fire (Fu Deng Huo) · Fire)Snake (巳)Male: Kan (Water · East Group)
Female: Gen (Earth · West Group)
☯ Verify Your Exact Year Pillar & Eight Mansions Ming Gua by Solar TermsEnter your exact birth date and hour to calculate your astronomical Lichun boundary and Ba Zhai Ming Gua down to the minute. Calculate Ming Gua

4 Psychological Profile, Behavioral Architecture & Male/Female Temperament of Yi Si

Psychology · Yi SiSeated Hurting Officer (Hurting Officer (Shang Guan))
Personality, behavioral psychology, and temperament of the Yi Si pillar
Inner temperament of Yi Si: blending Wood vitality with seated Hurting Officer (Hurting Officer (Shang Guan)).

Character shapes destiny. Inner qi directs outer action. The psychological architecture of an individual carrying the Yi Si (乙巳) pillar synthesizes the outward disposition of Heavenly Stem Yi (Supple creeping vines, orchids and spring shoots, the graceful breeze winding across fertile meadows), the subterranean drive of Earthly Branch Si (concealing Hurting Officer (Hurting Officer (Shang Guan))) at the Bathing Stage Star (Mu Yu) (Bath) stage, and the symbolic resonance of Lamp Fire; Heavenly Stem Yi (Wood) channels its vitality downward into Earthly Branch Si (Fire), creating an Eating God or Hurting Officer venting pattern of agile intellect, artistic expression, and strategic finesse.

Male & Female Expressions of Yi Si: Men uphold honor and strategic resolve. Women embody resilient grace and discernment. A male chart anchored by Yi Si blends the adaptable, tactful, aesthetically refined, resilient under pressure, and skilled at navigating complex human networks ethos of Yi with the pragmatic execution of seated Hurting Officer (Hurting Officer (Shang Guan)) to build enduring enterprises; meanwhile, a female chart with Yi Si radiates self-reliant intelligence infused with Hurting Officer (Hurting Officer (Shang Guan)) (Inventive, incisive, expressive, breaking conventional molds with brilliance), though under the influence of Ten-Great-Reversals Day (Ten Evils Great Defeat (Shi E Da Bai) · Requires Strict Treasury Discipline) she benefits from releasing perfectionism and nurturing open emotional dialogue.

Psychological Shadow to Transmute: Excessive rigidity invites fracture. Over-brooding drains vital spirit. The primary vulnerability of Yi seated on Si is a tendency to become internally hesitant, sensitive to environmental shifts, and occasionally overly accommodating or averse to direct confrontation, particularly during transit years triggering Stem-Clash Branch-Opposition (Xin Hai, Ji Hai) or activating the Xun Void branches (Yin, Mao (Yin, Mao)), when cognitive rigidity or emotional isolation must be consciously tempered.

5 The Yi Si Pillar in a Bazi Chart: 4 Natal Palaces & 4-Season Climate Regulation

Bazi centers upon the Day Master. Four pillars govern four life realms. Taking Heavenly Stem Yi (Yin Wood) as the reference point, the internal hidden-stem matrix beneath Earthly Branch Si and the functional role of Yi Si across the Year, Month, Day, and Hour Palaces unfold as follows:

5.1. Hidden Stems, Seated Ten Gods & 12 Life Stage Matrix of Yi Si

Hidden Stem Layer / SystemHeavenly Stem / CoordinateSeated Ten God / StateMetaphysical Function & Real-World Manifestation
Main Qi (60%)Bing (丙) · Yang FireHurting Officer (Hurting Officer (Shang Guan)) (傷官)Inventive, incisive, expressive, breaking conventional molds with brilliance
Middle Qi (30%)Wu (戊) · Yang EarthDirect Wealth (Direct Wealth (Zheng Cai)) (正財)Prudent, reliable, stewarding assets and sustainable cashflow with discipline
Residual Qi (10%)Geng (庚) · Yang MetalDirect Officer (Direct Officer (Zheng Guan)) (正官)Principled, honorable, civic-minded, upholding institutional order and status
12 Stages of GrowthYi seated on SiBathing Stage Star (Mu Yu) (Bath) StageRomantic, aesthetically sensitive, and eager to absorb new experiences, though requiring discipline to avoid distraction or Peach Blossom entanglements.
Xun Void (Void (Kong Wang))Jia Chen XunVoid: Yin, Mao (Yin, Mao)Whichever natal palace houses Yin, Mao (Yin, Mao) experiences lightened material attachment or sublimes toward research, strategy, and spiritual philosophy.

5.2. Diagnostic Differentiation of Yi Si Across the 4 Palaces (Year · Month · Day · Hour)

🏛 1. Yi Si in the Year Pillar (Ages 01 to 16)

Ancestral root of the chart. Foundation of early upbringing. Placed in the Year Pillar, Yi Si establishes the native's Lamp Fire Nayin destiny; Stem Yi reveals a family tradition that is adaptable, tactful, aesthetically refined, resilient under pressure, and skilled at navigating complex human networks, while Branch Si concealing Hurting Officer (Hurting Officer (Shang Guan)) indicates early self-reliance or leaving the ancestral hometown if clashed by the Month Branch (Hai).

🧭 2. Yi Si in the Month Pillar (Ages 17 to 32)

The Month Decree commands authority. Six-tenths of destiny hinges here. Occupying the Month Pillar (solar season of 4th Lunar Month (Early Summer · Fire Thrives, Metal Born)), the Fire qi of Branch Si and its hidden stems (Bing, Wu, Geng) define the primary Structural Pattern, while Stem Yi projecting above empowers Wood executive leadership throughout young adulthood.

👑 3. Yi Si in the Day Pillar (Ages 33 to 48)

Sovereign axis of the self. Inner chamber of marriage. As the Day Pillar, Yi Si forms the Luminous Output Venting (Refined Output Brilliance (Jing Hua Xie Xiu)) configuration at the Bathing Stage Star (Mu Yu) (Bath) stage; the Spouse Palace Si housing Hurting Officer (Hurting Officer (Shang Guan)) (傷官) and Ten-Great-Reversals Day (Ten Evils Great Defeat (Shi E Da Bai) · Requires Strict Treasury Discipline) portrays a spouse endowed with Inventive, incisive, expressive, breaking conventional molds with brilliance, ensuring resilient matrimony when Hai clashes are harmonized.

🌳 4. Yi Si in the Hour Pillar (Age 49 Onward)

Harvest of the golden years. Sanctuary of children and legacy. Seated in the Hour Pillar (09:00 to 11:00), the Lamp Fire qi and Luminous Output Venting (Refined Output Brilliance (Jing Hua Xie Xiu)) structure crystallize in late life; when Yi Wood and Si Fire serve as Favorable Useful Gods, the native enjoys affluent longevity and accomplished offspring.

ROLE OF THE YI SI (乙巳) PILLAR ACROSS THE FOUR PALACES Timeline & Life Domains: Ancestry (Year) · Career (Month) · Self & Spouse (Day) · Legacy & Children (Hour) YEAR PILLAR (NIÊN) Ages 01 to 16 Ancestral & Parental Palace • Nayin: Lamp Fire • Family lineage: Yi Wood • Branch Si ancestral root Diagnostic Focus: Early upbringing & innate q MONTH PILLAR (MONTH) Ages 17 to 32 Career & Sibling Palace • Month decree: Si (Fire) • Core structure: Hurting O • Stem Yi social vocation Diagnostic Focus: Governs 60% of chart streng DAY PILLAR (DAY) Ages 33 to 48 Self & Spouse Palace • Day Master Yi on Si • Seated: Hurting Officer ( • Stage: Bath (Bathing Stage Star (Mu Yu)) Diagnostic Focus: Core character & marriage HOUR PILLAR (HOUR) Age 49 Onward Children & Legacy Palace • Late-life harvest & legac • Stem Yi offspring star • Branch Si wealth treasury Diagnostic Focus: Golden years & final statur ★ Depending on which palace Yi Si occupies, its Seated Ten God (Hurting Officer (Hurting Officer (Shang Guan))) and Nayin (Lamp Fire) activate in that specific life era.
Figure 4: Functional differentiation of the Yi Si (乙巳) Pillar across the Year, Month, Day, and Hour Palaces

5.3. Four-Season Climate Regulation Matrix (Tiao Hou Yong Shen) from Qiong Tong Bao Jian

Climate governs nobility. Seasonal balance takes precedence. According to Qiong Tong Bao Jian (窮通寶鑑), for the Yi Si pillar to achieve upper-tier prosperity, the chart must first secure its Climate-Regulating Useful God (Climatic Balancing Useful God (Tiao Hou Yong Shen)) to balance Cold, Heat, Dryness, and Dampness across the four birth seasons:

Birth Season (Month Decree)Qi State of Yi (Wood)Climatic ImbalanceClimate-Regulating & Balancing Useful Gods (Qiong Tong Bao Jian)
Spring (Yin, Mao, Chen)Spring Wood under Wood decreeResidual chill / exuberant WoodIn the spring months when tender shoots sprout, heavy Metal is strictly taboo lest it wound the nascent buds; Bing Fire is cherished as warm sunlight alongside Gui Water as gentle rain so flowers and foliage may unfurl in full radiance.
Summer (Si, Wu, Wei)Summer Fire blazes, Earth parchedScorching heat & droughtIn the blazing summer months when fierce heat parches the meadows, Gui Water stands as the supreme Climate-Regulating God to relieve drought, assisted by moderate Bing Fire and Geng-Xin Metal to replenish the Water source.
Autumn (Shen, You, Xu)Autumn Metal holds crisp authorityDry atmosphere & sharp MetalIn the autumn months when crisp Metal qi sweeps the land and blossoms fade into ripened seed, Bing Fire is favored to temper the Metal chill while Gui Water nourishes the roots, or Jia Wood appears for the auspicious 'Vine Entwining the Tall Tree' (Teng Luo Xi Jia) formation.
Winter (Hai, Zi, Chou)Winter Water freezes heaven & earthSevere frost & glacial lockIn the bitter winter months when heaven freezes and earth locks, all botanical life retreats inward; Bing Fire-the solar orb-is the sole life-saving Useful God, ensuring that cold Wood turns toward the sun and achieves both fame and fortune.
SEASONAL CLIMATE-REGULATING MATRIX OF YI SI (QIONG TONG BAO JIAN) Stem Yi (Wood) + Branch Si (Fire) & Nayin Lamp Fire SPRING Yin • Mao • Chen Yi Wood Qi State: PROSPEROUS (In Decree) Wood thrives, residual chill Climate Useful God: Bing Fire, Gui Water Auxiliary Support: Geng Metal prunes boughs SUMMER Si • Wu • Wei Yi Wood Qi State: RESTING (Drained) Fire blazes, Earth parched Climate Useful God: Gui Water, Ren Water Auxiliary Support: Geng Metal feeds Water AUTUMN Shen • You • Xu Yi Wood Qi State: DEAD (Controlled) Metal crisp, dry atmosphere Climate Useful God: Ding Fire controls Metal Auxiliary Support: Ren-Gui feeds Wood WINTER Hai • Zi • Chou Yi Wood Qi State: PHASE-STRONG (Fed) Water freezing, ice-locked Climate Useful God: Bing Fire thaws frost Auxiliary Support: Wu Earth dams floods Core Principle When Reading the Yi Si (乙巳) Pillar: Prioritize Climate Regulation (Cold-Hot-Dry-Damp balance of birth month) first, then evaluate Day Master strength & Nayin protection.
Figure 3: Seasonal strength fluctuations and Climate-Regulating Useful God (Climatic Balancing Useful God (Tiao Hou Yong Shen)) selection for Yi Si across the Four Seasons

6 Career Trajectory, Executive Vocations & Wealth Architecture of Yi Si

Career & Wealth · 乙巳Fire & Wood Vocations
Career trajectory, wealth structure, and executive domains for Yi Si
Wealth and career alignment for Yi Si across Fire and Wood industries.

Wealth follows structural alignment. Prosperity requires timely cycles. Individuals carrying the Yi Si (乙巳) pillar command a dual competitive advantage derived from their primary seated Ten God Hurting Officer (Hurting Officer (Shang Guan)) (傷官) inside Branch Si and the classical imagery of Lamp Fire (Covered treasure-lamp flame illuminating chambers where sun and moon do not reach), excelling in Fire industries (Artificial intelligence & electronics, renewable energy, media & entertainment, fine arts, gastronomy, leadership coaching & psychology) as well as Wood vocations (Education & academia, pharmaceuticals & herbal medicine, forestry & agribusiness, publishing & media, sustainable architecture, cultural arts).

Guard treasury discipline. Reject reckless speculation. Empowered by seated Hurting Officer (Hurting Officer (Shang Guan)) (Inventive, incisive, expressive, breaking conventional molds with brilliance), Yi Si natives possess keen long-horizon valuation instincts; however, because Lamp Fire is sensitive to Great Ocean Water (Da Hai Shui) (Great Ocean Water), Milky Way Water (Tian He Shui) (Sky River Water), Thunderbolt Fire (Pi Li Huo) (tempests extinguishing the lamp), they should avoid high-leverage gambles during direct branch-clash years (Hai) or Stem-Clash Branch-Opposition (Xin Hai, Ji Hai) transits.

7 Marriage, Compatibility, Shen Sha Stars & Harmony-Clash-Punishment Map

Human affinity follows energetic law. Synastry demands whole-chart synthesis. When evaluating marital compatibility or strategic partnerships for Yi Si (乙巳), authentic Ziping Bazi examines Heavenly Stems, Earthly Branches, Nayin resonance, and Shen Sha auxiliary stars simultaneously:

Interaction Tier / Shen ShaStem-Branch / Palace CoordinateAuspiciousness & Practical Synastry Application
Heaven & Earth Twin HarmonyPillar Geng ShenStem Yi unites with Geng / Geng (Transforms to Metal), Branch Si unites with Shen / Shen (Transforms to Water); supreme marital and executive synergy that dissolves obstacles.
Three Harmonies, Six Harmonies & DirectionalTrine: Si · You · Chou (Si-You-Chou Metal Bureau)
Six Harmony: Shen / Shen (Transforms to Water) • Directional: Si · Wu · Wei (Si-Wu-Wei Southern Fire)
Consolidates elemental momentum into a unified alliance, stabilizing the Spouse Palace and long-term partnerships.
Stem-Clash Branch-OppositionDual Clashes: Xin Hai, Ji Hai
Same-Stem Clash: Yi Hai
Heavenly Stem clashes/competes while Earthly Branch opposes (Si vs. Hai); requires a bridging Useful God and proactive patience.
Clash · Punishment · Harm · BreakClash: Hai • Harm: Yin
Punishment: Yin, Shen / Yin, Shen (Ungrateful Punishment) • Break: Shen
Can trigger friction, unspoken misunderstandings, or relational fatigue unless buffered by conscious empathy and Six-Harmony remedies.
Nobleman, Lu, Horse & Peach BlossomNobleman: Zi, Shen (Zi, Shen) • Academic: Wu
Lu: Mao • Horse: Hai • Blossom: Wu
Heavenly Nobleman turns crisis into grace; Academic Star elevates scholarship; Lu & Sky Horse fuel global wealth; Canopy (Chou) & Ten-Great-Reversals Day (Ten Evils Great Defeat (Shi E Da Bai) · Requires Strict Treasury Discipline) shape charisma.
STEM-BRANCH INTERACTIONS & SHEN SHA MATRIX OF YI SI (乙巳) Heaven-Earth Affinity, Stem-Clash Branch-Opposition, Three Harmonies, Six Harmonies & Auxiliary Stars 乙巳 PILLAR YI SI Lamp Fire Void (Void (Kong Wang)): Yin, Mao ✦ Heaven & Earth Twin Harmony Twin Pillar: Geng Shen Stem Geng (Metal) + Branch Shen (Water) Supreme marital & strategic synergy ⚠ Stem-Clash & Branch-Clash Clashes: Xin Hai • Ji Hai Same-Stem Clash: Yi Hai Major turbulence in matching transit years ☯ Three & Six Branch Harmonies Trine: Si-You-Chou (Metal) Six Harmony: Si + Shen (Water) Directional: Si · Wu · Wei (Si-Wu-Wei So ⚡ Clash · Punishment · Harm Clash: Hai • Harm: Yin Punish: Yin, Shen / Yin, Shen (Ung Break (Phá): Si breaks Shen ★ Nobleman, Thriving Lu & Sky Horse • Heavenly Noble: Zi, Shen • Academic: Wu • Lu: Mao • Yang Blade: Chen • Horse: Hai Activates benefactor aid & mobility in matching years ❖ Peach Blossom, Canopy & Special Star • Peach Blossom: Wu • Canopy: Chou • General: You • Formation: Ten-Great-Reversals Day (Thập Ác Đ Jia Chen Xun · Void Branches: Yin, Mao
Figure 2: Stem-Branch interaction map (Twin Harmony, Clashes, Trines, Six Harmonies) and Shen Sha system of Yi Si
📊 Run a Complete Four Pillars Bazi Compatibility & Synastry AnalysisPlot the full Eight-Character charts of both partners to verify Useful God complementarity and neutralize Stem-Branch clashes. Plot Bazi Chart

8 Feng Shui Colors, Directions, Numbers & Dual-Layer Useful God Strategy

Feng Shui · FireUseful God & Spatial Sectors
Auspicious Feng Shui colors, directions, and Useful God activation for Yi Si
Dual-layer Feng Shui strategy combining Nayin Lamp Fire and Day Master Yi.

Remedies must address the root. Reject superficial formulas. In classical Feng Shui and Bazi luck enhancement for Yi Si (乙巳), rigorous practitioners distinguish Layer 1: Annual Nayin Destiny (Lamp Fire · Fire Element) for daily social resonance from Layer 2: Natal Day Master Useful God (Yi Wood) for high-stakes career, investment, and spatial decisions:

Enhancement DimensionLayer 1: By Nayin Destiny Lamp Fire (Fire Element)Layer 2: By Day Master Yi (Wood) Useful God
Auspicious Colors• Same Element (Fire): Cinnabar red, peach blossom pink, warm amber-orange, radiant violet (Pure Fire)
• Generating Mother: Lush emerald green, jade green, spring leaf green (Wood generates Fire)
• Weak Chart (needs Resource Water, Peer Wood): Water & Wood palettes
• Strong Chart (needs Output Fire, Wealth Earth): Fire & Earth palettes
Colors to ModeratePitch black, deep abyssal navy (Water controls Fire)Avoid overusing colors belonging to the chart's Unfavorable Element (Ji Shen) that disrupt seasonal climate balance.
Directions & Artifacts• Sectors: Due South (Li, Native Fire Palace) / Due East (Zhen) and Southeast (Xun, Wood fuels Fire)
• Numbers: Number 9 (Later Heaven) and 2, 7 (He Tu Fire) • Items: Natural amethyst, ruby, red carnelian, rose quartz, Himalayan salt lamp, aromatic agarwood incense
Prioritize the compass sector of your Natal Useful God, Heavenly Nobleman (Zi, Shen (Zi, Shen)), and Thriving Lu / Sky Horse (Mao, Hai).
FENG SHUI & USEFUL GOD STRATEGY BLUEPRINT FOR YI SI (乙巳) Dual-Layer Alignment: Day Master Useful God (Yi Wood) & Classical Nayin Destiny (Lamp Fire, Fire) 1. When Natal Chart Is Weak (Needs Support) • Priority Useful Gods: Water (Resource) & Wood (Peer) • Core Strategy: Deepen credentials, seek mentors & alliances • Activation: Use Lu (Mao) & Nobleman (Zi, Shen) sectors • Avoid reckless leverage or isolated confrontation in weak cycles 2. When Natal Chart Is Strong (Needs Venting) • Priority Useful Gods: Fire (Output) & Earth (Wealth) • Core Strategy: Launch ventures, scale capital & execution • Activation: Channel Output-to-Wealth & Sky Horse (Hai) • Maximize executive decisiveness and market leadership 3. Nayin Resonance: Lamp Fire • Favored Nayin: Ravine Water (Jian Xia Shui) (Ravine Water), Tuyền Tru • Caution Nayin: Great Ocean Water (Da Hai Shui) (Great Ocean Water), Thiê • Classical Image: Covered treasure-lamp flame illuminati • Partner with complementary Nayin per Lan Tai Miao Xuan 4. Auspicious Partners & Spatial Sectors • Twin & Six Harmony: Geng Shen • Branch Shen (Water) • Three-Harmony Trine: Si-You-Chou (Metal) • Root Sectors: Due East (Stem) & South-Southeast (Branch) • Resolve Hai clashes using Shen (Water) or Trine bridges
Figure 5: Holistic luck-enhancement blueprint for Yi Si, Integrating Ziping Useful Gods with Classical Nayin

9 Strategic Destiny Cultivation & 3 Forensic Bazi Case Studies by Master Ung Khiem

Forensic Cases · 乙巳Master Ung Khiem Archives
Real-world Four Pillars Bazi chart consultations featuring the Yi Si pillar
Strategic destiny cultivation and real-world Bazi case verification for Yi Si.

To know destiny is to master destiny. Aligning with cosmic timing ensures triumph. The classical sages taught that “The noble person understands destiny and remains free from anxiety” · a native carrying the Yi Si (乙巳) pillar who grasps the interplay between Lamp Fire and the Luminous Output Venting (Refined Output Brilliance (Jing Hua Xie Xiu)) axis can proactively ally with Ravine Water (Jian Xia Shui) (Ravine Water), Spring Water (Quan Zhong Shui) (Spring Water, as lamp oil), Willow Wood (Yang Liu Mu), Wall Earth (Bi Shang Tu), Gold Foil Metal (Jin Bo Jin) partners, cultivate seated Hurting Officer (Hurting Officer (Shang Guan)) virtues, and activate Sky Horse (Hai) and Nobleman (Zi, Shen (Zi, Shen)) mobility to neutralize Stem-Clash Branch-Opposition (Xin Hai, Ji Hai) years.

9.1. Three Forensic Bazi Chart Case Studies Featuring Yi Si (From Master Ung Khiem's Research Archives)

📂 Case Study #1: Yi Si in the Year Pillar · Lamp Fire Achieving Noble Resonance

Year PillarYi Si (乙巳)
Month PillarGeng Shen
Day PillarJia Chen
Hour PillarBing Mao

Forensic Diagnosis & Timing: Deep foundation. Limpid structural flow. Born in the Yi Si (1965) year, this chart's Year Pillar Lamp Fire forms an auspicious Heaven-and-Earth Twin Harmony with the Month Pillar Geng Shen, while the Hour Pillar anchors the Thriving Lu and regulates climate; entering Favorable Useful God Decade Luck (Fire, Earth) after age 32, the native built a premier enterprise in artificial intelligence & electronics.

📂 Case Study #2: Yi Si Day Pillar Born in Mid-Winter, Supreme Climate Rescue via Bing Fire

Year PillarRen Zi (壬子)
Month PillarGui Chou (癸丑)
Day PillarYi Si (乙巳)
Hour PillarBing Wu (丙午)

Forensic Diagnosis & Timing: Extreme cold births returning warmth. A single Bing Fire redeems the entire chart. With the Yi Si Day Pillar (Bathing Stage Star (Mu Yu) (Bath) stage, seated on Hurting Officer (Hurting Officer (Shang Guan))) born in the glacial Gui Chou winter month, the Hour Pillar Bing Wu (丙午) emerges like the meridian sun to thaw the frozen natal field in exact accordance with Qiong Tong Bao Jian, propelling the native from early-life hardship to executive leadership during the Ding Si, Wu Wu Decade Luck after age 35.

📂 Case Study #3: Yi Si Encountering a Xin Hai Stem-Clash Branch-Opposition Transit & Classical Resolution

Year PillarJia Chen (甲辰)
Month PillarYi Si (乙巳)
Day PillarDing You (丁酉)
Hour PillarGeng Xu (庚戌)

Forensic Diagnosis & Remedy: Meet fierce clash with tactical yielding. Use affinity to dissolve opposition. When the annual transit pillar Xin Hai struck the natal Month Pillar Yi Si in a direct Stem-Clash Branch-Opposition (Fan Yin), the native proactively applied the classical protocol of “Resolving Clash via Six Harmony & Sky Horse Mobility”-restructuring operations, relocating the executive office toward the Nobleman sector (Zi, Shen), and partnering with a Shen (Water) ally to preserve capital and capture a new regional market.

10 Classical Canon & Scholarly Bibliography

Scholarship demands canonical roots. Every doctrine rests on primary texts. This monograph on the Yi Si (乙巳 · Yi Si) pillar and its Lamp Fire (Lamp Fire (Fu Deng Huo)) Nayin destiny was compiled by Master Ung Khiem directly from the foundational classics of Ziping Bazi and Nayin metaphysics:

  • San Ming Tong Hui (三命通會 · Wan Min-ying, Ming Dynasty): Volumes 1 to 3 Treatise on the Sixty Jiazi Nayin, examining the origin of Lamp Fire (覆燈火) and the structural divergence between Yi Si and Jia Chen.
  • Lan Tai Miao Xuan (蘭臺妙選 · Song Dynasty): Poetic imagery and Nayin resonance conditions for Lamp Fire.
  • Di Tian Sui Chan Wei (滴天髓闡微 · Liu Bo-wen & Ren Tie-qiao): Canonical verses on Heavenly Stem Yi (“乙木雖柔,刲羊解牛,懷丁抱丙,跨鳳乘猴”) and Earthly Branch Si.
  • Qiong Tong Bao Jian (窮通寶鑑 · Yu Chun-tai): Twelve-month Climate-Regulating Useful God (Tiao Hou Yong Shen) selection for Stem Yi.
  • Zi Ping Zhen Quan (子平真詮) & Yuan Hai Zi Ping (淵海子平): Doctrines of the Twelve Stages of Growth (Bathing Stage Star (Mu Yu) (Bath)), Hidden Stems & Seated Ten Gods (Hurting Officer (Hurting Officer (Shang Guan))), and Xun Void (Yin, Mao (Yin, Mao)).

Core Methodological Principle: One pillar never defines an entire life. All eight characters must be weighed together. Any analysis of the birth-year Nayin (Lamp Fire) or the standalone Yi Si pillar represents only one-quarter of the natal blueprint; accurate destiny forecasting requires plotting the complete Four Pillars Bazi Chart (Year · Month · Day · Hour) alongside 10-Year Decade Luck and Annual Transits.

Master Ung Khiem — Four Pillars Bazi & Classical Eastern Metaphysics Researcher
Master Ung Khiem
Researcher of Four Pillars Bazi, Zi Wei Dou Shu & Classical Feng Shui

Compiled from primary classical treatises-including San Ming Tong Hui, Di Tian Sui, Qiong Tong Bao Jian, and Zi Ping Zhen Quan-combined with empirical chart verification across thousands of consultations, this Sixty Jiazi series empowers readers to understand both their birth-year Nayin and the structural dynamics of their Four Pillars Bazi chart.

Plot your Four Pillars Bazi chart with Master Ung Khiem

11 Frequently Asked Questions About Yi Si (乙巳 · Yi Si)

Rank #42 of 60. Belongs to the Jia Chen Xun. In classical Chinese and Vietnamese sexagenary horology, Yi Si (乙巳, Yǐ Sì) unites Heavenly Stem Yi (Yin Wood) with Earthly Branch Si (Yin Fire, Zodiac Snake), placing its Xun Void at Yin, Mao (Yin, Mao) and carrying the Nayin destiny of Lamp Fire (Lamp Fire (Fu Deng Huo), Covered treasure-lamp flame illuminating chambers where sun and moon do not reach).

Fire Element destiny. Nayin Lamp Fire (Lamp Fire (Fu Deng Huo)). Individuals born in the Yi Si year correspond to Gregorian solar years 1905, 1965, 2025 (measured strictly from the Start of Spring / Lichun solar term); according to the Ming-dynasty compendium San Ming Tong Hui, they embody 覆燈火 (Covered treasure-lamp flame illuminating chambers where sun and moon do not reach) with unmistakable inner resilience.

Seated on Hurting Officer (Hurting Officer (Shang Guan)). Occupies the Bathing Stage Star (Mu Yu) (Bath) stage. Beneath Earthly Branch Si of the Yi Si pillar lie the hidden stems Bing (Main Qi, Hurting Officer (Hurting Officer (Shang Guan))), Wu (Middle Qi, Direct Wealth (Direct Wealth (Zheng Cai))), Geng (Residual Qi, Direct Officer (Direct Officer (Zheng Guan))); when referenced against Heavenly Stem Yi, the primary seated qi is Hurting Officer (Hurting Officer (Shang Guan)) (傷官), establishing a Luminous Output Venting (Refined Output Brilliance (Jing Hua Xie Xiu)) structural dynamic.

Distinct character. Deep marital loyalty. When Yi Si occupies the Day Pillar, Day Master Yi (Wood) sits directly upon the Spouse Palace Si (Fire) housing Hurting Officer (Hurting Officer (Shang Guan)), making the native adaptable, tactful, aesthetically refined, resilient under pressure, and skilled at navigating complex human networks while requiring conscious mindfulness to temper tendencies of being internally hesitant, sensitive to environmental shifts, and occasionally overly accommodating or averse to direct confrontation so domestic harmony endures.

Thrives with Geng Shen. Clashes with Xin Hai. The Yi Si pillar achieves supreme synergy when meeting its Twin Harmony partner Geng Shen (Heaven-and-Earth Union), the Three-Harmony trine (Si, You, Chou (Si-You-Chou Metal Bureau)), and Six-Harmony partner (Shen / Shen (Transforms to Water)); conversely, caution is required during Xin Hai or Ji Hai (Stem-Clash Branch-Opposition) and direct Hai clashes.

Palace shifts meaning. Timing alters destiny. In the Year Pillar it governs ancestral heritage and Lamp Fire innate qi; in the Month Pillar it sets the career structure around Hurting Officer (Hurting Officer (Shang Guan)); in the Day Pillar it defines core psychology and spouse dynamics; in the Hour Pillar it shapes late-life wealth and children after age 49.

Climate comes first. Strength follows second. According to Qiong Tong Bao Jian (Exhaustive Treasury of Seasonal Harmonization), Stem Yi (Wood) of the Yi Si pillar born in Spring requires warming residual chill, Summer demands Water to relieve scorching heat, Autumn needs balanced Metal-Fire tempering, and Winter urgently requires Bing Fire to thaw the frozen chart.

Favors Fire phase. Nobleman at Zi, Shen. By Nayin destiny Lamp Fire, Yi Si natives harmonize with Cinnabar red, peach blossom pink, warm amber-orange, radiant violet (Pure Fire), directions Due South (Li, Native Fire Palace), and enjoy Heavenly Nobleman protection at Zi, Shen (Zi, Shen), Academic Star at Wu, Thriving Lu at Mao, and Sky Horse mobility at Hai.

Plot Your Complete Four Pillars Bazi Chart

Discover how the Yi Si (乙巳) pillar interacts with your Year, Month, Day, and Hour Palaces, 10-Year Decade Luck, and Climate-Regulating Useful God.

☯ Launch Bazi Chart Calculator

Explore All 60 Pillars of the Sexagenary Cycle

Compare Yi Si with all 60 Heavenly Stem and Earthly Branch pillars, 30 Classical Nayin destinies, and Seated Ten Gods.

🀄 View Complete 60 Jiazi Index