← All ten day masters

Day master types · Yang Metal

The Geng day master, computed

"What are Geng people like" is a high-frequency search whose answers are almost all borrowed adjectives. This page goes the other way: everything computable about Geng (Yang Metal) is computed here — where Lu, the blade, the noblemen and Wenchang land, which stem it combines with and into what, which stem clashes it, its six of the sixty day pillars, and the twelve-stage strength of every branch. Every number is checkable and every rule is on the methodology page. No adjectives produced; structure you can audit.

Computed facts (engine-verified)

This page is generated from engine vv0.14.0; the Lu-equals-Official-Post and blade-equals-Prosperity cross-checks are asserted for all ten stems at build time — conventions R32/R34.

Day master Geng · Yang Metal
Lu — the Official-Post seat Shen — cross-checked: the Official-Post seat of Geng lands exactly here
Yang blade — the Prosperity seat You — the yang blade is the mainstream reading
Nobleman branches (both schools)Chou and Wei (main) · Yin and Wu (alt) — the two schools disagree exactly on Geng and Xin
Wenchang — the study star Hai
Stem combine (and what it becomes)Geng combines with Yi; the pair transforms to Metal
Stem clashJia — one of the four heavenly clashes
Twelve-stage startBirth begins at Si, counting forward (Yang stems)
Day pillars carrying this stem6 of 60: 庚午 Geng Wu, 庚辰 Geng Chen, 庚寅 Geng Yin, 庚子 Geng Zi, 庚戌 Geng Xu, 庚申 Geng Shen
Prosperity inside its own pillarsnone of the sixty day pillars puts Geng on its Prosperity branch (parity of stems and branches blocks it — see the index distribution)

The full twelve-branch scan (main qi × ten god × twelve stages × marks)

One row per branch: main-qi hidden stem, ten god against the day master, its twelve-stage strength, and where Lu, the blade, the noblemen and Wenchang land. Blanks in the marks column are information too.

BranchMain qiTen god vs day stemTwelve stageMarks
Zi (Rat) GuiHurting OfficerDeath
Chou (Ox) JiDirect ResourceTombNobleman (main school)
Yin (Tiger) JiaIndirect WealthExtinctionNobleman (alt school)
Mao (Rabbit) YiDirect WealthConception
Chen (Dragon) WuIndirect ResourceNourishment
Si (Snake) BingSeven KillingsBirth
Wu (Horse) DingDirect OfficerBathingNobleman (alt school)
Wei (Goat) JiDirect ResourceAttiringNobleman (main school)
Shen (Monkey) GengPeerOfficial PostLu — the earned post
You (Rooster) XinRivalProsperityYang blade — the edge
Xu (Dog) WuIndirect ResourceDecline
Hai (Pig) RenEating GodIllnessWenchang — the study star

Scan your own four pillars

Enter your birth moment (time optional). The page marks each of your four branches; if your day master is not this page's stem, it links to your own day-master page.

A note on what this page deliberately does not do: the popular versions of this material assign a fixed personality to each term — one character per branch, one destiny per stage. This site rejects that framing. What is published here is a structural position: which element sits where, on what kind of ground, with which tenants inside. The same term reads differently under a different month command, and no meaningful judgement exists without the other characters of the chart. 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.

Frequently asked

What is a Geng day master like?
Classical texts attach adjectives to every day master, but adjectives cannot be audited. This page gives the computable structure: Geng is Yang Metal, Lu at Shen, blade at You, noblemen at Chou and Wei, six of the sixty day pillars. Take the personality words or leave them — this site only produces the part you can check line by line.
How do I find my own day master?
The stem of your day pillar is your day master. Use the calculator on the home page. Note that the year pillar changes at Lichun (solar longitude 315 degrees) — not on New Year and not on the lunar first.
Why does Geng own only six day pillars?
The sixty jiazi pair stems and branches of matching parity: Geng is a Yang stem, so it only sits on Yang branches — exactly six of the twelve. That same parity decides the Prosperity row: if the Prosperity branch has the wrong parity, it never appears in a day pillar.
What do the marks (Lu, blade, nobleman) mean?
They are single-character-anchored structural positions. The scanner below marks which of your four branches carry them. Counts and landings are checkable; verdicts are not offered — whole-chart strength is the favorable-element calculator's job.

The three scenario pages of this day master

Career →  ·  Wealth →  ·  Relationship →

The other stem of the same element

Xin(same Metal)

All ten day masters

Jia · Yi · Bing · Ding · Wu · Ji · Xin · Ren · Gui

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.