| Heavenly stem | 乙 Yi · Yin Wood |
|---|---|
| Earthly branch | 巳 Si · Snake (Fire) |
| Hidden stems | 丙 Bing Fire (Hurting Officer), 戊 Wu Earth (Direct Wealth), 庚 Geng Metal (Direct Officer) |
| Sits on | Hurting Officer |
| Na Yin | 覆灯火 Lamp Fire |
| Growth stage | 沐浴 Bath |
The image of Yi Si
Yi (乙) is Yin Wood: vines, grasses, flowering plants. Si (巳), the Snake, is the Fire of early summer, roughly May into early June, when gardens burst into color. Wood feeds Fire, so this pillar pictures a plant pouring its sap into blossoms. The hidden stems (藏干, cang gan) inside Si are Bing (丙) Fire, Wu (戊) Earth and Geng (庚) Metal.
Its nayin (纳音, na yin), the poetic second element attached to each pair in the sixty-cycle, is Lamp Fire (覆灯火, fu deng huo). Old lamps burned oil pressed from seeds, so Yi is quite literally the fuel. Yi also stands at the Bath (沐浴, mu yu) stage of the twelve growth stages (十二长生, shi er chang sheng), the newborn's first wash: fresh, exposed and traditionally linked with charm.
Personality
Hurting Officer (伤官, shang guan), the star under your feet, is Wood producing Fire of the opposite polarity. It tends to bring flair, fast wit and a critic's eye. You notice what is clumsy in a room, a design or an argument, and you can rarely resist improving it. The Snake keeps much of this under wraps; you often plan three moves further ahead than you let on.
The Bath stage adds restlessness and a love of trying on new looks, roles and ideas. Your mood can rise and fall with the audience, and praise matters more to you than you admit. At your best you are a translator of beauty, turning feelings into words, images or style that other people remember.
Love and the spouse palace
Your day branch is the spouse palace (夫妻宫, fu qi gong), and it holds a striking detail. Tucked inside Si is Geng Metal, your Direct Officer (正官, zheng guan), and Yi and Geng form one of the five classic stem combinations. Tradition reads this as an attraction to steady, decisive partners, with commitment often close at hand.
The twist is that Bing Fire, your Hurting Officer, sits right beside it, and Fire melts Metal. Your frankness can scorch the very structure you love. Direct Wealth (正财, zheng cai), also hidden here, suggests the bond works best with practical anchors: shared routines, fair chores, honest money talks. Let your partner be solid without trying to redesign them.
Work and money
Your talent is the product. You tend to shine in work that is seen or heard: design, performance, marketing, teaching, languages, styling, persuasive writing. In traditional terms Hurting Officer feeds Wealth, and the Direct Wealth in your branch adds a practical streak, so your best projects usually pair creative freedom with a clear brief and a reliable client.
Strengths and blind spots
You are perceptive, persuasive and quick to find the elegant solution. The same fire can run hot. Rules you consider foolish bring out the rebel in you, and one sharp remark can cost more goodwill than it wins. Like a plant blooming in the heat, you can also spend yourself fast, so protect time for quiet refueling.
Yi Si in 2027
In the Fire Goat year of Ding Wei (丁未), Ding Fire is your Eating God (食神, shi shen), the gentle, enjoyable side of self-expression. The Goat also joins your Snake in the Snake-Horse-Goat summer trio (三会, san hui), so Fire gathers around your spouse palace. Creative work, hosting and shared pleasures tend to flow. Mind your reserves: Wood feeding this much Fire needs Water, meaning rest, study and mentors, to keep blooming.
Every Yi day pillar shares the same Day Master. Read the full Yi Wood Day Master profile.
Yi Si day pillar: common questions
Why is Yi Si linked with charm?
Two traditional markers point that way. Yi stands at the Bath stage on Si, a growth stage long associated with attraction and first impressions, and the pillar sits on Hurting Officer, the star of flair and eloquence. Together they describe someone people notice. Charm is only a tendency, though, and how you use it matters more.
Is Yi Si a weak day pillar?
Taken alone, Yi Wood has no root in the Snake, and its energy flows out into Fire, so many readers treat it as leaning weak. Your birth month and the other pillars decide the real balance. If the chart is light on Wood, then Water and Wood elsewhere tend to steady it.
Yi Si and Jia Chen share a nayin. How do they differ?
Both carry Lamp Fire, but they play different roles in it. Jia Chen is timber resting in damp soil at the Decline stage, seasoned and resource-minded. Yi Si is oil-rich growth feeding the flame at the Bath stage, expressive and quick. One is the lamp's steady fuel store; the other is the bright, flickering light.
BaZi is a traditional Chinese system offered here for self-reflection and entertainment. Readings describe tendencies, not certainties, and are not medical, legal or financial advice.