Ba Zi Day Master guide · 10 of 10

Yin Water: The Rain

Gui (癸), the tenth of the ten Heavenly Stems.

4 min read · 7 November 2026
The short answer

Gui (癸) is Yin Water, the last of the ten Heavenly Stems. Its classical image is rain, mist or morning dew: gentle, intuitive and quietly life-giving. People born on a Gui day are traditionally read as imaginative, empathetic and wise, with a deep inner world.

The imageThe Rain

Rain doesn't announce itself like a river. It falls softly, everywhere, and soaks into the ground where no one can see it. Weeks later, the whole hillside is green.

That's Gui. As the last of the ten stems, it is traditionally the most subtle and the most mysterious: the dream before waking, the mist over the valley. Its influence is quiet, gradual and often far greater than anyone realises.

StrengthsWhat Yin Water brings

IntuitionGui senses what isn't said. You often know before you know why.
ImaginationMist shapes itself into anything. Gui has a rich inner world and a creative mind.
Gentle influenceRain changes the landscape slowly. Gui persuades, inspires and nourishes rather than commands.
WisdomWater seeks the lowest place. Gui is often humble, reflective and wise beyond its years.

The shadowWhere Yin Water gets stuck

Mist can hide things, including from yourself. Gui's trap is withdrawal, anxiety and escapism: drifting into daydreams, avoiding hard realities, absorbing everyone's emotions like rain into soil. Gui can feel misunderstood and may struggle to say exactly what it wants.

In loveYin Water in relationships

In love, Gui is tender, empathetic and imaginative, the partner who understands without words. It needs emotional safety and gentleness. The growth edge is clarity: naming your needs, not just sensing everyone else's, and stepping out of the mist so you can be found.

At workYin Water and career

Gui flourishes in quiet, meaningful, imaginative work: writing, art, music, psychology, research, healing, spiritual or behind-the-scenes strategy. It does well when it can work in its own rhythm. Harsh, loud, purely competitive environments drain it.

BalanceWhat helps Yin Water thrive

Classically, rain needs a source to keep falling: Metal (辛 and 庚, the 'mother' of Water) gives Gui support, structure and resilience. A little Fire (丙, the sun) turns mist into a rainbow: visibility, warmth and confidence. Too much Earth muddies it. Your full chart shows what truly balances your Water.

How it connectsYin Water and the five elements

In Ba Zi, every element feeds one element and controls another. From the point of view of a Yin Water Day Master, here's what each element represents:

Same element · CompanionWater: friends, siblings, peers, and rivals. Support, and competition.
Feeds you · ResourceMetal: learning, mentors, rest, the people and habits that nourish you.
You feed · OutputWood: your creativity, expression and what you give to the world.
You control · WealthFire: what you work on and earn from. Money, tasks, results.
Controls you · PowerEarth: discipline, authority, rules and pressure. It shapes you, or wears you down.

Its natural partner among the ten stems is Yang Earth (戊 Wu). The two stems "combine," which is traditionally read as an attraction, though real compatibility always depends on both full charts.

Born on a Gui dayFamous Yin Water Day Masters

Lewis Carroll, who dreamed up a whole world down a rabbit hole, was born on a Gui day, the day of mist and dreams.

Calculated by SkyConfluence from documented birth dates. Birth times aren't known, so these are by calendar date.

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FAQQuick questions

What does Gui Water mean in Ba Zi?

Gui (癸) is Yin Water, the tenth Heavenly Stem. Its image is rain, mist or dew, traditionally linked with intuition, imagination, gentle influence and wisdom.

How do I find my Day Master?

Your Day Master is the Heavenly Stem of the day you were born, taken from the 60-day cycle used in Chinese calendars. You can calculate it from your date of birth with the free calculator on SkyConfluence's Day Master page.

Which Day Master pairs with Yin Water?

In Ba Zi, each stem has one "combination" partner. Gui (癸) combines with Wu (戊, Yang Earth), traditionally read as a natural attraction. Real compatibility depends on both full charts, not one stem.

All tenThe other Day Masters

甲Yang Wood乙Yin Wood丙Yang Fire丁Yin Fire戊Yang Earth己Yin Earth庚Yang Metal辛Yin Metal壬Yang Water癸Yin Water
Sources and notes Imagery follows the classical Ba Zi tradition, including the Di Tian Sui (滴天髓) and the Qiong Tong Bao Jian (穷通宝鉴), retold in plain English. Background: Heavenly Stems, Four Pillars of Destiny. Famous examples: day pillars calculated by SkyConfluence from documented birth dates (Gregorian calendar, by calendar date; birth times are not known, so a late-evening birth could fall on the next day in some schools). Ba Zi is a traditional system of symbolism, offered for reflection and entertainment, not prediction.