The 10 BaZi Day Masters (十天干日元总论)

“甲木参天，脱胎要火。春不容金，秋不容土。火炽乘龙，水宕骑虎。地润天和，植立千古。” — Di Tian Sui (滴天髓 · 天干论)

In Four Pillars of Destiny (BaZi), Jia (甲) represents Yang Wood—the primordial timber of great forests, architectural pillars, and upright leadership. Individuals born with a Jia Wood Day Master exhibit natural moral authority, protective benevolence, and a refusal to bow under unjust pressure.

“乙木虽柔，刲羊解牛。怀丁抱丙，跨凤乘猴。虚湿之地，骑马亦忧。藤萝系甲，可春可秋。” — Di Tian Sui (滴天髓 · 天干论)

Yi (乙) embodies Yin Wood—orchids, medicinal herbs, climbing vines, and bamboo that bends in a typhoon yet never snaps. Yi Wood individuals triumph through emotional intelligence, strategic flexibility, aesthetic refinement, and network alliances.

“丙火猛烈，欺霜侮雪。能煅庚金，逢辛反怯。土众成慈，水猖显节。虎马犬乡，甲来成灭。” — Di Tian Sui (滴天髓 · 天干论)

Bing (丙) is Yang Fire—the sun in the sky that gives warmth and photosynthesis to the entire planet without keeping accounts. Bing Fire individuals are naturally magnetic, transparent, optimistic, and slow to hold grudges.

“丁火柔中，内性昭融。抱乙而孝，合壬而忠。旺而不烈，衰而不穷。如有嫡母，可秋可冬。” — Di Tian Sui (滴天髓 · 天干论)

Ding (丁) is Yin Fire—the focused flame of a scholar’s lamp, an alchemist’s smelting furnace, or the stars guiding night travelers. Ding Fire individuals combine quiet exterior poise with laser-like internal concentration.

“戊土固重，既中且正。静翕动辟，万物司命。水润物生，火燥物病。若在艮坤，怕冲宜静。” — Di Tian Sui (滴天髓 · 天干论)

Wu (戊) represents Yang Earth—high mountain ranges, stone citadels, and river dams. Wu Earth individuals are the bedrock of any organization or family: composed under crisis, faithful to their word, and capable of containing turbulent forces.

“己土卑湿，中正蓄藏。不愁木盛，不畏水狂。火少火晦，金多金光。若要物旺，宜助宜帮。” — Di Tian Sui (滴天髓 · 天干论)

Ji (己) is Yin Earth—rich topsoil, terraced rice paddies, and potter’s clay. Unlike rigid Wu mountain rock, Ji Earth absorbs water, welcomes deep roots, and quietly transforms raw seeds into abundant harvests.

“庚金带煞，刚健为最。得水而清，得火而锐。土润则生，土干则脆。能赢甲兄，输于乙妹。” — Di Tian Sui (滴天髓 · 天干论)

Geng (庚) is Yang Metal—unrefined iron ore, broadswords, heavy machinery, and surgical instruments. Born for action and reform, Geng Metal individuals value loyalty, speed, and tangible results, thriving under pressure that would break softer temperaments.

“辛金软弱，温润而清。畏土之叠，乐水之盈。能扶社稷，能救生灵。热则喜母，寒则喜丁。” — Di Tian Sui (滴天髓 · 天干论)

Xin (辛) is Yin Metal—already-refined gold jewelry, imperial jade seals, platinum watches, and microchips. Unlike raw Geng ore that craves furnace fire, Xin Metal is already a finished masterpiece that shines brightest when rinsed in clear flowing Ren Water (壬水淘洗).

“壬水通河，能泄金气。刚中之德，周流不滞。通根透癸，冲天奔地。化则有情，从则相济。” — Di Tian Sui (滴天髓 · 天干论)

Ren (壬) is Yang Water—mighty rivers, ocean currents, and global trade routes. Ren Water individuals think in macro systems, adapt instantaneously to obstacles, and possess tremendous intellectual and entrepreneurial momentum.

“癸水至弱，达于天津。得龙而运，功化斯神。不愁火土，不论庚辛。合戊见火，化象斯真。” — Di Tian Sui (滴天髓 · 天干论)

Gui (癸) is Yin Water—gentle spring rain, morning dew, underground mineral springs, and atmospheric clouds. Though quiet on the surface, Gui Water penetrates the deepest crevices and nourishes every living root silently.