How Gyeongsin is built

Gyeongsin (庚申) is the 57th of the sixty pillars. Its upper character is the yang form of metal, and its lower character carries metal as the branch of the Monkey.

Both characters carry the same element, metal. This is called ganyeojidong — the force runs one way, so the character shows up sharply, with little to cushion it.

The upper character is unrefined metal at scale, and the branch below is metal too — a ganyeojidong pillar where hardness doubles. The twelve-stage reading lands on Officer as well, so both scales point the same way.

Indirect Resource and Eating God sit together in the branch. Taking in and putting out are both housed inside, so learning alone and delivering alone becomes the natural loop. The step of asking for help gets skipped from the same structure.

The twelve-stage position — Officer

In the twelve life stages, this day master meets its branch at Officer — standing on its own strength — the most workmanlike position. The twelve stages are not a grade of good or bad; they mark which phase the force is currently in.

Metal in this stage builds its own footing without borrowing. The strength shows clearly in execution, which also means it lands on the delivering side of the table before the table-changing side.

Hidden stems — present inside, unseen outside

The branch hides 3 heavenly stems: 戊 as Indirect Resource for 7 days, 壬 as Eating God for 7 days, 庚 as Friend for 16 days. The day count is how many of a month's thirty days that stem holds command, and the label is how the day master reads it.

The stem holding command longest is 庚 as Friend, so it represents this position. The 戊 and 壬 ahead of it stays out of sight until conditions bring it up — present inside without showing on the surface.

A spouse palace of Friend

The day branch is read as the spouse palace. Its commanding stem registers to the day master as Friend — the same force as the self — an equal that stands level with you.

Each carrying their own share sits easier than leaning. With ganyeojidong, the stretch where neither backs down can run long, so an agreement to let some things pass unsettled does more for the relationship than winning them.

Void branches

The void branches here are Ja (子) and Chuk (丑) — the two left without heavenly stems when the sixty are cut into six runs of ten. Void does not mean absent — it means force does not settle there easily. Where those branches appear in a chart, that area often resolves toward thought and belief rather than material hold.

From here it splits person to person

This is as far as the two characters alone can settle. Two people with the same day pillar read differently once the birth month and hour change. Whether the day master runs strong or weak in particular needs all eight characters and the season together — the day pillar alone cannot answer it.

ARO stacks three more independent calculations on top of the chart. Enter a birth date and time to see where this day pillar actually sits inside your own.

Related terms

• 건록 (建祿)Standing on your own with stable, established strength. Entering your prime.
• 비견A peer-level rhythm — it can branch into collaboration or competition.
• 편인A rhythm where the unconventional route still works. Worth leaning on intuition.
• 식신An easy, pleasant flow. Good food, rest, and expression are all welcome.