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Day Pillar 37 of 60 · Nayin Wall Earth

Geng Zi (庚子) Day Pillar — Yang Metal on the Rat

The Geng Zi day pillar pairs the Geng day master (Yang Metal) with the Zi branch (Water, the Rat). Below: the computed facts, what the seat relation and twelve-stage position mean structurally, the nayin gloss, the classical reading of the spouse palace, and an instant lookup for your own pillar.

Computed facts (engine-verified)

This page is generated from the engine, not hand-written; structural facts reconcile against the methodology page.

Day master庚 Geng · Yang Metal
Day branch子 Zi (Rat) · Water
Hidden stems癸 Gui (Hurting Officer, main qi)
Stage of the stem hereDeath (8 of 12)
NayinWall Earth · 壁上土 (shared with Xin Chou 辛丑)
Seat relationStem generates branch (xie) — traditional term: 泄

How Geng sits on Zi

The stem generates the branch: Metal flows into Water, so the Geng day master sits on ground that continuously draws its output. Traditional wording calls this 泄 (xiè, "draining") — the self is spent into its own base. Again this is a statement of flow, not of fortune: the day master's energy has a standing outbound channel right under it, and the rest of the chart decides whether that channel is a liability or a productive one.

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Nayin: Wall Earth

Wall Earth (壁上土): earth plastered into an interior wall — ground that makes a space livable.

The spouse palace (day branch)

In the spouse palace this is an Output (食伤) configuration: the classical reading treats the partner-side branch as the place where the Geng day master expresses rather than absorbs. The structural point — stated by the tradition, not by this site — is that intimacy here runs through expression and making. Whether that lands well in an actual relationship depends on the other seven characters, which is why this page stops at structure.

The main qi 癸 (Gui, Hurting Officer) defines the palace's classical group: Output.

A note on what this page deliberately does not do: the internet is full of "60 personality types" tables that assign a fixed character to each day pillar. This site rejects that framing. A day pillar is a structural position — who sits where, on what kind of ground, with which hidden tenants. The same pillar reads differently under a different month command, and no meaningful judgement exists without the other six characters. Where the tradition offers a reading, it is labelled as the tradition's; this site's own contribution is that every number and term on this page is computed, versioned, and checkable against the methodology page.

Find your own day pillar

Birth date alone is enough — the day pillar never needs a birth time. The calculation runs in your browser; nothing is sent anywhere.

Frequently asked

What is the Geng Zi (庚子) day pillar?
The Geng Zi day pillar pairs the Geng stem (Yang Metal) with the Zi branch (Water). Its computed facts: hidden stems Gui (Hurting Officer), the Geng stem at the Death stage on this branch, seat relation "undefined", and nayin Wall Earth (壁上土).
How do I find my own day pillar?
Use the calculator on this page (birth date is enough — the day pillar does not need a birth time) or the full chart calculator. Your day pillar is the third pillar of the four; each of the sixty has its own page on this site with the same computed structure.
Is the Geng Zi day pillar good or bad?
Neither, on its own. The seat relation (undefined) and the Death stage describe position and flow, not fortune. A meaningful reading needs the month command and the other six characters — any source that grades pillars as lucky or unlucky is simplifying past what the system itself claims.
What does the nayin Wall Earth mean?
Nayin (壁上土) is a two-thousand-year-old classification that gives each PAIR of pillars a symbolic element-image — for Geng Zi it is "Wall Earth", shared with its partner pillar Xin Chou (辛丑). It is a classical gloss layer, published here alongside the structural facts, never instead of them.

Nearby pillars

The other five pillars sharing this day master (Geng):

Geng Wu · Geng Chen · Geng Yin · Geng Xu · Geng Shen

Ji Hai ←  ·  → Xin Chou

Reference index

Every enumerable component of ba zi has its own page here. Each page is computed by the same engine and can be checked item by item — none of it is a personality table.