What is the Yi Day Master?

Yi (乙) is the Yin Wood stem, one of the ten possible Day Masters in BaZi. It is taught with the image of the vine and the grass. Yi is pictured as grass, vines and flowering plants: flexible, resourceful, good at finding the gap in a wall.

Is a Yi Day Master a prediction?

No. A Day Master is the reference point for describing the rest of a chart. The image describes tendencies people use it to talk about. It does not predict events, luck, health, money or relationships.

How do I find my Day Master?

Use the free Element Check. It runs in your browser in about a minute, and your birth date is not sent to us. This page asks for nothing and stores nothing.

Yi Day Master (乙 Yin Wood): the vine and the grass

At a glance. Yi (乙) is the Yin Wood stem, one of ten possible Day Masters. A Day Master is the stem of the day pillar, the reference point for describing a BaZi chart. The image describes tendencies, not outcomes, and it is not a reading of you. Last update: 2026-11-14.

What the Yi image describes

Yi is pictured as grass, vines and flowering plants: flexible, resourceful, good at finding the gap in a wall. Teachers use the image so the stem is easy to remember. People use it to talk about tendencies such as:

Finding the gap: getting through by adapting rather than pushing.
Growing with others, the way a vine uses a trellis.
Recovering quickly, as grass does after it is stepped on.

The stretch in the image: choosing a direction of its own, not only the one the trellis offers.

These are tendencies the image is used to talk about. They are not a description of you, and they do not predict anything. A full chart has eight characters; the Day Master is one of them.

Interactive

Where Wood sits among the five elements

Choose a relation, or tap a circle on the wheel. Each one is a word BaZi uses to describe how the rest of a chart relates to the Day Master.

Solid: feeding cycle (生). Dashed: shaping cycle (克). Outlined: Wood.

Same element · Companions 比劫
Other Wood stems sit beside Yi as peers. In chart vocabulary this group is called Companions (比劫): people and pressures that are like you. It names a relationship, not a rival or a friend.
What it feeds · Output 食伤
Wood feeds Fire (木生火). In chart vocabulary, what the Day Master feeds is its Output (食伤): expression, making, saying. It describes a direction of energy, not talent or luck.
What it shapes · Wealth 财
Wood shapes Earth (木克土). In chart vocabulary, what the Day Master shapes is called Wealth (财): what it works on and manages. Despite the name, it is not a money forecast.
What shapes it · Officer 官杀
Metal shapes Wood (金克木). In chart vocabulary, what shapes the Day Master is called Officer (官杀): rules, deadlines, responsibility. It describes structure, not punishment.
What feeds it · Resource 印
Water feeds Wood (水生木). In chart vocabulary, what feeds the Day Master is called Resource (印): learning, support, rest. It is a kind of input, not a guarantee of help.

Compare

Yi next to another Day Master

Pick a friend's stem, or one you are curious about, to see how the two elements relate in BaZi vocabulary.

乙 Yi and 甲 Jia (Yang Wood, the tall tree)
Both are Wood. Yi is Yin Wood and Jia is Yang Wood: the same element with opposite polarity. This is vocabulary for how two elements relate. It is not a compatibility score and says nothing about how two people will get on. Open the Jia page
乙 Yi and 丙 Bing (Yang Fire, the sun)
Wood feeds Fire (木生火): Yi's element flows toward Bing's. They have opposite polarity. This is vocabulary for how two elements relate. It is not a compatibility score and says nothing about how two people will get on. Open the Bing page
乙 Yi and 丁 Ding (Yin Fire, the lamp and the candle)
Wood feeds Fire (木生火): Yi's element flows toward Ding's. They have the same polarity. This is vocabulary for how two elements relate. It is not a compatibility score and says nothing about how two people will get on. Open the Ding page
乙 Yi and 戊 Wu (Yang Earth, the mountain)
Wood shapes Earth (木克土): Yi's element acts on Wu's, the way an axe works wood or a dam holds water. They have opposite polarity. This is vocabulary for how two elements relate. It is not a compatibility score and says nothing about how two people will get on. Open the Wu page
乙 Yi and 己 Ji (Yin Earth, the field)
Wood shapes Earth (木克土): Yi's element acts on Ji's, the way an axe works wood or a dam holds water. They have the same polarity. This is vocabulary for how two elements relate. It is not a compatibility score and says nothing about how two people will get on. Open the Ji page
乙 Yi and 庚 Geng (Yang Metal, the blade and the ore)
Metal shapes Wood (金克木): Geng's element acts on Yi's. They have opposite polarity. This is vocabulary for how two elements relate. It is not a compatibility score and says nothing about how two people will get on. Open the Geng page
乙 Yi and 辛 Xin (Yin Metal, the jewel)
Metal shapes Wood (金克木): Xin's element acts on Yi's. They have the same polarity. This is vocabulary for how two elements relate. It is not a compatibility score and says nothing about how two people will get on. Open the Xin page
乙 Yi and 壬 Ren (Yang Water, the river and the sea)
Water feeds Wood (水生木): Ren's element flows toward Yi's. They have opposite polarity. This is vocabulary for how two elements relate. It is not a compatibility score and says nothing about how two people will get on. Open the Ren page
乙 Yi and 癸 Gui (Yin Water, rain and mist)
Water feeds Wood (水生木): Gui's element flows toward Yi's. They have the same polarity. This is vocabulary for how two elements relate. It is not a compatibility score and says nothing about how two people will get on. Open the Gui page

Element relations describe structure. They are not a compatibility score.

Not sure Yi is yours?

Your Day Master is the top character of your day pillar. The free Element Check finds it in about a minute; it runs in your browser, and your birth date is not sent to us. For what a Day Master is, see What is a Day Master?; for all ten teaching images, see Day Master images.

Find your Day Master free What is a Day Master?

Quick answers

What is the Yi Day Master?: Yi (乙) is the Yin Wood stem, one of the ten possible Day Masters in BaZi. It is taught with the image of the vine and the grass. Yi is pictured as grass, vines and flowering plants: flexible, resourceful, good at finding the gap in a wall.
Is a Yi Day Master a prediction?: No. A Day Master is the reference point for describing the rest of a chart. The image describes tendencies people use it to talk about. It does not predict events, luck, health, money or relationships.
How do I find my Day Master?: Use the free Element Check. It runs in your browser in about a minute, and your birth date is not sent to us. This page asks for nothing and stores nothing.

The other nine Day Masters

TangoEra describes BaZi as a cultural and reflective practice. Nothing on this page is a personal reading, a prediction, or professional advice.

Yi 乙: Yin Wood, the vine and the grass

My Day Master is Yi

What the Yi image describes

Where Wood sits among the five elements

Same element · Companions 比劫

What it feeds · Output 食伤

What it shapes · Wealth 财

What shapes it · Officer 官杀

What feeds it · Resource 印

Yi next to another Day Master

乙 Yi and 甲 Jia (Yang Wood, the tall tree)

乙 Yi and 丙 Bing (Yang Fire, the sun)

乙 Yi and 丁 Ding (Yin Fire, the lamp and the candle)

乙 Yi and 戊 Wu (Yang Earth, the mountain)

乙 Yi and 己 Ji (Yin Earth, the field)

乙 Yi and 庚 Geng (Yang Metal, the blade and the ore)

乙 Yi and 辛 Xin (Yin Metal, the jewel)

乙 Yi and 壬 Ren (Yang Water, the river and the sea)

乙 Yi and 癸 Gui (Yin Water, rain and mist)

Not sure Yi is yours?

Quick answers

The other nine Day Masters