The Jia Shen Pair (甲申): Jiazi Explained
Jia Shen (甲申) is the 21st of the sixty Jiazi pairs, the stem-branch combinations that structure the entire Chinese calendar, BaZi charts and Qi Men Dun Jia timing alike. In the current cycle its years are 2004 and 2005, followed by its partner pair Yi You (乙酉) completing the same nayin group.
A wood monkey is a toolmaker with an agenda. Wonderful for ventures that need inventing, risky for ventures that need minding.
If that sounds abstract, think of the sixty pairs as the alphabet of Chinese time. Every year, month, day and hour in these systems is written in one of these sixty combinations, so understanding a pair is understanding the vocabulary the whole system speaks.
Jia Shen Quick Facts
| Item | Value |
|---|---|
| Position | 21 of 60 |
| Heavenly stem | 甲 (Jia), Wood, Yang |
| Earthly branch | 申 (Shen), Monkey |
| Branch element | Metal |
| Current-cycle years | 2004 (Wood Monkey), 2005 (Wood Rooster) |
| Nayin | Water in the Spring (泉中水) |
What the Jia Shen Pair Means: A Disciplining Pair
Classical analysis of a stem-branch pair starts with their elements, and here the branch restrains the stem: Metal controls Wood. The ground disciplines the core, which reads as pressure that shapes: structure, restraint and lessons arriving through circumstances rather than through choice.
This relation is why two pairs can both be called auspicious while feeling completely different in a life. The nourishing pairs suggest support arriving from the environment; the commanding pairs suggest the person taking charge of the environment; the disciplining pairs suggest life itself as the teacher. None of the five relations is good or bad. Each is a style of exchange between a person’s core and their ground.
The Two Years of the Water in the Spring Nayin Group
Jia Shen (甲申) and Yi You (乙酉) share the nayin Water in the Spring (泉中水): spring water: steady, nourishing, refreshing everyone who draws from it. People born in 2004 carry the Wood Monkey year, and people born in 2005 carry the Wood Rooster year. The year-by-year detail, including the Li Chun boundary and the branch interactions, lives on the dedicated year pages, and the full chart method is in the BaZi chart guide.
Year-by-year readings for this pair: BaZi 2004, BaZi 2005.
Because the cycle repeats every sixty years, Jia Shen years also include 1944, 1884, and will return in 2064. The pair is the same; the generations differ, which is a nice reminder that a chart describes energies, not destinities.
Where Jiazi Pairs Appear in Your Chart
Every pillar in your BaZi is a jiazi pair: year, month, day and hour each carry one of these sixty combinations. The day pillar, most important of the four, has a one-in-sixty chance of being Jia Shen, and practitioners meet the pair again in decade luck cycles, annual years and QMDJ charts. If you want to see how the pairs are actually extracted from birth data, the beginner step-by-step guide walks through the whole process in one sitting.
The Monkey Branch in Jia Shen
The branch carries the zodiac identity of the pair, here the Monkey, and with it the layer people actually feel in daily life. Every Monkey year, month, day or hour written with this branch carries the same family of themes: the tendencies, the strengths and the friction points that follow the Monkey wherever the pair appears in a chart. Readers who want the full Monkey picture, from branch interactions to 2027 timing, will find it in the zodiac and BaZi references on this site.
How to Find Your Own Jiazi Pair
Any BaZi chart lists the four pillars, and each pillar is one of these sixty pairs. Look up the day pillar, which most software and printed charts mark clearly, and the pair name written beside it is the one to study first. The year pillar pair, like the one this page describes when you were born in 2004, is the background layer; the day pair is the core. Both are worth knowing, and both take under a minute to find with the beginner plotting guide.
Jia Shen FAQ
Which years are Jia Shen years?
In the current cycle, 2004 and 2005. Going back: 1944 and 1945, 1884 and 1885. The pair returns every sixty years, and exact year boundaries follow Li Chun, around February 4, not Chinese New Year; the Chinese New Year dates reference has the exact boundaries.
What does it mean if my day pillar is Jia Shen?
Your core self carries the a disciplining pair signature. In element terms, the branch restrains the stem: Metal controls Wood. The ground disciplines the core, which reads as pressure that shapes: structure, restraint and lessons arriving through circumstances rather than through choice. How that plays out in your life depends on the rest of the chart, which is exactly what a full reading addresses.
What is the nayin of Jia Shen?
Water in the Spring (泉中水), shared with Yi You. Nayin is the poetic element nickname attached to each pair, a background texture in classical readings rather than the headline.

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