Geng Zi (庚子): the Yang Metal Rat, pillar 37 of 60
Last checked · images quoted from the San Ming Tong Hui on Chinese Wikisource; dates calculated
Compiled by the Fengshui Zen editors · About and method
庚子 is pillar 37 of the sixty: the yang metal stem 庚 Geng over the Rat branch 子 Zi. The last 庚子 year was 2020 and the next is 2080; the next 庚子 day is Nov 22, 2026. The San Ming Tong Hui gives it the image of earth hollow inside: a house, and it shares the Na Yin Earthen Wall Earth (壁上土) with 辛丑.
Stem
庚 Geng · Yang Metal
Branch
子 Zi · Rat · Water
Na Yin
壁上土 Earthen Wall Earth
Void branches
辰巳 (Dragon, Snake)
庚子 in the San Ming Tong Hui (三命通會)
By Wan Minying (Ming dynasty), chapter one, quoted from Chinese Wikisource; translations are ours.
Image, from the list of the sixty pillars
庚子……土中空者，屋宇也
庚子: earth hollow inside: a house.
Why its Na Yin is called 壁上土, from 「论纳音取象」
气居闭塞，物尚包藏，掩形遮体，内外不交
Its qi is shut in and things are still wrapped up; it screens and covers, and inside and outside do not meet.
Its Na Yin against the facing one, 路旁土 (庚午 and 辛未)
壁上路旁，形分聚散，类别死生也
Wall and Roadside: one gathered, one scattered in form; told apart as dead and living.
The likes, dislikes and star names that follow in the book are not reproduced. Read 三命通會 卷一 on Wikisource.
Inside the 庚子 pillar
| Hidden stem in 子 | Element | Ten God from 庚 |
|---|---|---|
| 癸 Gui (main) | Yin Water | Hurting Officer 伤官 |
| Branch element against the stem | Water 水: an element the stem produces (Metal) |
|---|---|
| Root of the stem | Geng has no root in 子: none of its hidden stems is Metal |
| Twelve stages | Geng is in 死 Death on 子 |
| Ten-day group (旬) | starts with 甲午; void branches 辰 Chen, 巳 Si |
| As an hour pillar | the Rat hour, 23:00-01:00, on 丁 and 壬 days |
How 子 Zi relates to the other branches
| Six Harmony (六合) | 丑 Chou (Ox), associated with Earth |
|---|---|
| Clash (六冲) | 午 Wu (Horse) |
| Harm (六害) | 未 Wei (Goat) |
| Punishment (刑) | 卯 Mao |
| Three Harmony (三合) | 申子辰: the Water frame |
| Seasonal group (方合) | 亥子丑: North, Winter, Water |
庚 Geng against each Day Master
| Day Master | 庚 is its | Chinese |
|---|---|---|
| 甲 Jia Wood | Seven Killings | 七杀 Qi Sha |
| 乙 Yi Wood | Direct Officer | 正官 Zheng Guan |
| 丙 Bing Fire | Indirect Wealth | 偏财 Pian Cai |
| 丁 Ding Fire | Direct Wealth | 正财 Zheng Cai |
| 戊 Wu Earth | Eating God | 食神 Shi Shen |
| 己 Ji Earth | Hurting Officer | 伤官 Shang Guan |
| 庚 Geng Metal | Friend | 比肩 Bi Jian |
| 辛 Xin Metal | Rob Wealth | 劫财 Jie Cai |
| 壬 Ren Water | Indirect Resource | 偏印 Pian Yin |
| 癸 Gui Water | Direct Resource | 正印 Zheng Yin |
庚子 years, 1900 to 2100
Next 庚子 months and days
China Standard Time; a month runs from one jie solar term to the next.
Months
- Dec 7, 2026 to Jan 5, 2027
- Dec 7, 2031 to Jan 6, 2032
Days
- Nov 22, 2026
- Jan 21, 2027
- Mar 22, 2027
- May 21, 2027
- Jul 20, 2027
- Sep 18, 2027
FAQ
Is 庚子 a good or bad pillar?
Not on its own; that depends on the whole chart, which this site does not read. Structurally, Geng has no root in 子, which clashes with 午 and combines with 丑.
What is the Na Yin of Geng Zi?
Earthen Wall Earth (壁上土), which Geng Zi shares with 辛丑 Xin Chou; the Na Yin names go in pairs, 30 for the 60 pillars. The San Ming Tong Hui explains how the name was chosen in its 论纳音取象 section, quoted above.
Which years are Geng Zi (庚子) years?
Between 1900 and 2100: 1900, 1960, 2020, 2080. Each starts at Lichun, around February 4, not on January 1. Under the Chinese New Year rule the same years are the Year of the Yang Metal Rat.
Neighboring and related pillars
Quotations keep the script of the source. Not a reading, a prediction or advice.