Geng Shen·庚申·Gyeongsin
Written by DK
The Geng Shen day pillar, 庚申 in hanja and 경신 (Gyeongsin) in Korean Saju, is a yang Metal day master on a Metal branch. Of the 24,112 庚 charts this site has measured, 4,015 fall on a 庚申 day. Those read as strong in 67.9 per cent of cases, weak in 12.0 and balanced in 20.1. Taking every 庚 day together the split is 46.6 per cent strong, 32.5 weak and 21.0 balanced.
The figures come from running this site’s engine over every day of the stem from 1950 to 2009, with a birth in Seoul every two hours from two in the morning to ten at night. Midnight is left out: once Seoul’s clock is corrected for its longitude, a midnight birth falls on the day before, which carries a different stem.
Structure藏干
What the branch 申 holds, and what each of those stems is to a 庚 day master. The day counts are the classical weights within a thirty-day month, main stem first.
| Hidden stem | Qi | Days of 30 | Ten God to 庚 |
|---|---|---|---|
| 庚 Yang Metal | 正氣 primary | 16 of 30 | 比肩 Friend |
| 壬 Yang Water | 中氣 middle | 7 of 30 | 食神 Eating God |
| 戊 Yang Earth | 餘氣 residual | 7 of 30 | 偏印 Indirect Resource |
In the twelve-stage cycle a 庚 day master on 申 sits at 臨官 Officialdom.
Personality性
Geng (庚), Yang Metal, is the axe-head and raw ore — decisive, unbending, cut clean. In this pillar it sits on Shen (申), itself a Metal branch, so stem and branch are Metal same Metal: an intensification, not a mixture. The branch's primary hidden stem, 庚 Geng again, holds 16 of 30 days and expresses as 比肩 Friend, the dominant Ten God of the whole pillar — a peer, not a superior or subordinate. The core of this day pillar is self-referential strength: capability measured against itself. That strength sits at 臨官, Officialdom, the stage just short of the cycle's peak — already fully formed and self-starting, holding a post through earned competence rather than raw potential. Two lesser hidden stems add texture. 戊 Wu, Yang Earth, at a residual 7 days, expresses as 偏印 Indirect Resource: unconventional insight, self-taught understanding. 壬 Ren, Yang Water, also 7 days, at the branch's middle qi phase, expresses as 食神 Eating God: the one outlet through which the compacted metal can flow outward as something made rather than merely wielded. The pillar is blunt at its root and privately resourceful at its edges, with the Eating God its only real release valve.
Career職
Friend dominant and no Officer or Seven Killings among the hidden stems mean this pillar carries no built-in pull toward hierarchy; its natural fit is with peers, guilds, and competitive crafts rather than chains of command. Officialdom supplies the competence to run an operation solo — precision trades, metalwork, engineering, editing, surgery, martial arts, or any field rewarding a sharp, self-directed cut through material or problem. The Eating God (壬) channels that competence into output, something built or performed; the Indirect Resource (戊) suits specialist knowledge acquired outside formal schooling. The natural path answers mainly to its own standard, working beside equals rather than beneath a superior.
Wealth財
No wealth god — neither 正財 Direct Wealth nor 偏財 Indirect Wealth — appears among the hidden stems, so money is not this branch's business. What income arrives tends to come as a by-product of the Eating God's output: paid for what is made or performed, not pursued through negotiation or investment instinct. With Friend dominant, resources are also treated communally or competitively — split with peers, staked against rivals — rather than privately hoarded. Financial security is built by skill compounding over time, not by any native feel for capital.
Love & Compatibility緣
This pillar brings steadiness, directness, and self-sufficiency — a partner who says what is meant and rarely leans on others, consistent with an Officialdom stage already self-established. The Eating God (壬) offers a way to show care through making and doing rather than words. What is difficult is the doubled Metal itself: stem and branch reinforcing each other leave little give, and the dominant Friend energy can turn partnership into a quiet contest of wills between equals unwilling to yield. The Indirect Resource (戊) adds a private, self-contained inner life not easily offered up, so intimacy here is built through consistent action rather than disclosure.
Best & Worst Pairings合
The strongest matches share the branch 巳 (Si), in Six Harmony with Shen, together transforming to Water: 丁巳 Ding-Si, 乙巳 Yi-Si, and 己巳 Ji-Si. Six Harmony is a clasp, not a collision — the branches lock and soften each other, and each visiting Day Master arrives at 長生, Long Life, its own stage of fresh growth, so the union revitalizes rather than depletes. Each stem supplies what this pillar's own hidden stems lack: 丁 brings 正官 Direct Officer, the structure absent from a Friend-dominant chart; 乙 brings 正財 Direct Wealth, filling the wealth gap directly; 己 brings 正印 Direct Resource, a formal counterpart to this pillar's own indirect, self-taught 戊. The worst matches carry the branch 寅 (Yin), which clashes outright with Shen: 丙寅 Bing-Yin, 甲寅 Jia-Yin, and 戊寅 Wu-Yin. A clash uproots rather than merely strains, disturbing the very branch that gives this pillar its Officialdom footing, and each partner sits at 絕, Extinction, the cycle's most depleted stage. The stems compound it: 丙 brings 七殺 Seven Killings, pressure rather than legitimate authority; 甲 brings 偏財 Indirect Wealth, restless money at odds with a self-reliant, wealth-less pillar; and 戊 repeats this pillar's own 偏印 Indirect Resource, which classically threatens to smother the Eating God's one outlet — compounding the clash with a stifled outlet as well.