Heavenly Stems (Cheongan)
Ten symbols representing heavenly energy — the Yang and Yin forms of each element
The Heavenly Stems (Cheongan) are ten symbols representing celestial energy: Gap, Eul, Byeong, Jeong, Mu, Gi, Gyeong, Sin, Im, and Gye. Each Stem is a combination of one of the Five Elements and either Yin or Yang polarity.
Yang Stems: Gap (Yang Wood), Byeong (Yang Fire), Mu (Yang Earth), Gyeong (Yang Metal), Im (Yang Water)
Yin Stems: Eul (Yin Wood), Jeong (Yin Fire), Gi (Yin Earth), Sin (Yin Metal), Gye (Yin Water)
Personality of each Heavenly Stem:
● Gap (Yang Wood): A great tree. Upright, principled, and proactive. Leadership and drive.
● Eul (Yin Wood): Flowers and grass. Flexible and highly adaptable. Diplomatic and artistic.
● Byeong (Yang Fire): The sun. Bright, lively, and overflowing with energy. Passionate and charismatic.
● Jeong (Yin Fire): A candle flame. Delicate, warm, and steady. Focus and perseverance.
● Mu (Yang Earth): A great mountain. Solid and stable. Trustworthy and embracing.
● Gi (Yin Earth): Flatland and farmland. Receptive and practical. Productive and considerate.
● Gyeong (Yang Metal): Steel and rock. Hard and decisive. Just and straightforward.
● Sin (Yin Metal): Gems and refined metal. Sharp and perfectionist. Aesthetic and incisive.
● Im (Yang Water): A vast ocean or great river. Broad, embracing, and wise. Grand scale and composure.
● Gye (Yin Water): Dew and rain. Delicate, calm, and deeply insightful. Intuition and sensitivity.
In Saju, the Day Master (Ilgan) represents the self, and through its relationship with the other Stems and Branches, one can identify social roles, talents, and relationship patterns.
Because Heavenly Stems represent outwardly expressed energy, they play a central role in understanding one's social persona and career aptitude. For example, a person whose Day Master is Byeong (Yang Fire) tends to be extroverted and enjoys shining in front of others, often finding a natural fit in sales, public speaking, broadcasting, and leadership positions. In contrast, someone with a Gye (Yin Water) Day Master has a strong capacity for quiet observation and analysis, and tends to excel in research, planning, counseling, and artistic fields.
The harmonies (Hap) between Heavenly Stems carry crucial significance in Saju interpretation. There are five Stem Harmonies: Gap-Gi combine into Earth, Eul-Gyeong into Metal, Byeong-Sin into Water, Jeong-Im into Wood, and Mu-Gye into Fire. When a harmony is formed, the original natures of the two Stems transform, generating the energy of a new element. This process is called "Haphwa" (harmony transformation), and charts containing such harmonies often exhibit strong relational bonds and sociable tendencies.
Conflict relationships between Stems also exist. When Stems in a controlling relationship face each other — such as Gap versus Gyeong, or Eul versus Sin — tension arises. These Stem conflicts are interpreted as signals of external friction, competition, or impending change.
In DESTIGER, the distribution and interactions of the Heavenly Stems in a user's natal chart are analyzed automatically. The system identifies what Ten God relationships the Year, Month, and Hour Stems form relative to the Day Master, whether any Stem Harmonies are active, and what reactions incoming Stems from Major Luck Cycles or Annual Fortune trigger with the natal chart, delivering the most meaningful interpretation for the present moment.