Yi-Si Day Pillar: Yi Wood over Si Fire, Spouse Palace Hurting Officer
The day pillar is the closest of the four to you: the stem is you (the Day Master) and the branch is your spouse palace. The Yi-Si pillar is therefore about the relationship between "Yi Wood the person" and "Si the partner".
- Day Master
- Yi Wood
- Spouse palace
- Si（Fire）
- Palace star
- Hurting Officer
- Na Yin
- Sheltered Lamp Fire
- Void
- Yin, Mao
- Zodiac
- Snake
What is the structure of Yi-Si?
Yi-Si is the stem Yi over the branch Si. Yi is Yin Wood and is your Day Master, standing for you; Si is Fire and sits in the day branch, which is the spouse palace. The relation between the two therefore says two things at once: the grain of the person, and their default position inside an intimate relationship.
Hidden stems and Ten Gods: where the real weight sits
Each branch holds stems that are not written on the face of the chart, yet they decide how much each Ten God actually weighs. Si holds 丙, 戊, 庚, which to the Day Master Yi Wood are:
The 本氣 carries the most weight, so the spouse palace of Yi-Si mainly shows the face of Hurting Officer; the middle and residual stems are undertones that surface when a luck cycle or annual pillar stirs them.
Spouse palace in Si: partner tendencies and how to get on
The partner：The partner is clever and articulate, conscious of image, quick to think and careful to calculate, and very capable in public. Si is Yin Fire: it burns inside, so the outside can look composed.
Where to put the effort：Saving face comes first; undercutting them in front of others does far more damage than you would expect. They persuade with reasons, so answering only with emotion will not connect — translate the feeling into a reason they can follow.
Worth saying plainly: the spouse palace describes a tendency, not who a person is bound to meet. It reads more like a map of the routes you take easily inside a relationship — knowing it saves a few wrong turns.
Special structures in Yi-Si
Ten Evils Great Defeat
The classical view：Classically called Ten Evils Great Defeat — a frightening name for what is simply the Day Master’s prosperity star falling into the void.
In plain terms：The name comes from old date-selection practice and originally meant "the income that should be there is voided": money comes in and goes out rather than accumulating. It is not a verdict that a life is doomed to fail.
Proportion：This is the single most misleading name among all the symbolic stars. In practice, if the chart itself is strong and the luck cycle cooperates, the effect is slight. Seeing it is no cause for alarm — read the whole chart, as always.
Na Yin: Sheltered Lamp Fire
Sheltered Lamp Fire: light held in a golden cup, brilliance breathed from a jade stand.
The small flame sheltered within a lamp, steady and bright, lighting the way by night. Warm and finely attuned, it can guide people through the dark; what matters is keeping this lamp from being troubled by the wind.
Each Na Yin is shared by two pillars: Yi-Si shares Sheltered Lamp Fire with Jia-Chen. It is a supporting layer of imagery — useful for overall flavour, but it does not override the main line set by the Day Master and the spouse palace.
Void branches: Yin, Mao
Yi-Si belongs to the Jia-Chen decade, which never reaches the branches Yin, Mao; these are its void branches. Whatever a voided pillar stands for tends to be "present but not solid" — not absent, but hard to hold, or late in arriving. In practice it matters which pillar is voided and whether it is clashed or combined; the fact alone settles nothing.
Which day pillar is yours?
The day pillar is set by your birth day. Enter your birth date, solar or lunar, and get your Four Pillars chart free in 30 seconds — your day pillar, your spouse palace, and the full spread of Ten Gods.
Yi-Si day pillar FAQ
What is the personality of the Yi-Si day pillar?
The Day Master Yi Wood is the subject: With Yi Wood as your Day Master, you are like flowering plants and climbing vines: gentle and soft on the surface, yet extraordinarily resilient underneath. The day branch Si is the spouse palace and stands as Hurting Officer to the Day Master, adding a second layer. Personality is read from the whole chart; the day pillar is only its most central part.
What kind of partner does the Yi-Si day pillar suggest?
The partner is clever and articulate, conscious of image, quick to think and careful to calculate, and very capable in public. Si is Yin Fire: it burns inside, so the outside can look composed.
Is the Yi-Si day pillar good or bad?
No day pillar is inherently good or bad. The spouse palace star of Yi-Si is Hurting Officer, which names a pattern of relating, not a score. What actually decides how smoothly things run is the balance of the whole chart and the luck cycle, not one pillar.
What are the void branches of Yi-Si?
Yi-Si belongs to the Jia-Chen decade, so its void branches are Yin, Mao. Which pillar the void lands on, and whether it is stirred by a clash or combination, is what matters; the bare fact decides nothing.