Ren Water Day Master (壬, Yang Water)
Quick answer: Ren (壬) is the ninth of the ten Heavenly Stems: Yang Water. You have a Ren Water Day Master if the stem of your day pillar is Ren. The Di Tian Sui pictures Ren as water that "links the great rivers" and drains metal's energy, and the commentary calls it the source of Gui — the hundred rivers, and also rain and dew. That image is a way to remember the stem's nature, not a verdict on anyone's personality.
Not sure of your Day Master? Find it from your birth date, or calculate your full chart.
The classical image: what the Di Tian Sui says
The Di Tian Sui (滴天髓) is traditionally attributed to Jing Tu of the Song dynasty, although its authorship is uncertain. It describes each stem in a short verse. This is its verse on Ren:
壬水通河，能洩金氣，剛中之德，周流不滯。通根透癸，衝天奔地。化則有情，從則相濟。
"Ren water links the great rivers and drains the energy of metal. Firm at its centre, it flows everywhere without stagnating. Rooted below with Gui showing above, it surges to the sky and races across the land. Transformed, it is affectionate; following, it lends help."
— Di Tian Sui, "天干論", Chanwei text. Wikisource opens 壬水汪洋. The exact gloss of 「通河」 is still provisional. Translation: PillarChart editorial team.
Line by line:
- "Links the rivers… drains metal" (通河，洩金氣). Ren is the moving, extensive form of Water. Metal produces Water; Ren is pictured as what carries that output away. The Wikisource note calls it Gui's source — hundred rivers, and also rain and dew.
- "Firm at its centre… flows without stagnating." Yang water's virtue in the verse: movement and circulation, not a personality of restlessness.
- "Rooted with Gui showing." Gui is yin water. The verse likes Ren rooted below with Gui visible among the stems.
- "Transformed… following." Technical language for transformation (合化) and follow structures (从格). Schools disagree on when those apply; our calculator does not auto-detect them.
Yin, yang and the Water element
Ren and Gui are the two forms of Water. Ren is yang (rivers, expanse); Gui is yin (the weakest, dew and rain).
| Gui | Ren | |
|---|---|---|
| Polarity | Yang Water | Yin Water |
| Classical image | Hundred rivers / rain and dew (百川，雨露) | Pure yin, weakest of all (純陰而至弱) |
| Di Tian Sui opening | 壬水通河 / 汪洋 | 癸水至弱 "weakest of all" |
| Main qi of the branch | 亥 Hai (Pig) | 子 Zi (Rat) |
| Also hidden in | 申 Shen (middle qi) | 丑 Chou, 辰 Chen |
| Combines with | 丁 Ding | 戊 Wu |
Read the partner page: Yin Water (Gui).
Season and climate: why your birth month matters
The month branch tells you the season Ren was born into, and so how much support it starts with. In the seasonal scheme of the Sanming Tonghui, Water is:
| Season (month branches) | Water's state | What it means for Ren |
|---|---|---|
| Spring (寅 Yin, 卯 Mao) | Resting 休 | Spending itself on wood |
| Summer (巳 Si, 午 Wu) | Trapped 囚 | Held back while fire is Prosperous |
| Sixth month (未 Wei) | Dead 死 | Out of season |
| Autumn (申 Shen, 酉 You) | Strong 相 | Nourished by metal |
| Winter (亥 Hai, 子 Zi) | Prosperous 旺 | In season, strongly supported |
The table follows the Sanming Tonghui text, which places Earth's season in the sixth month. The other Earth months (辰, 戌, 丑) are treated in more than one way across schools. See Five Elements.
Climate adjustment in the Qiongtong Baojian
The Qiongtong Baojian (窮通寶鑑) reads every Day Master month by month, asking first whether the chart needs warming, cooling or moistening. Its section on Ren in a key season opens:
正月壬水，汪洋之象，能并百川之流，然水性柔弱，宜用庚金之源，庶不致汪洋无度。
"Ren water in the first month has a vast look, able to merge a hundred streams; yet water's nature is soft, so the book uses Geng metal as the source — lest the expanse have no shore." — Qiongtong Baojian, 正月壬水 (Wikisource). Translation: PillarChart editorial team. Climate / adjustment lines only; the book also contains fixed fortune pronouncements, which we do not reproduce.
For other parts of the year, the book's climate recommendations for Ren include the following (paraphrased):
- Early summer (巳 Si): Bing is in command and water is extremely weak. The book takes Ren companions first, then Xin metal as a source (「专取壬水比肩为助，次取辛金发源」).
- Seventh month (申 Shen): Geng is in command and Ren sits on long-life in Shen, turning weak to strong. The book specialises in Wu earth, with Ding to assist (「专用戊土，次取丁火佐戊制庚」).
- Tenth month: Ren is at peak command. The book takes Wu as primary, and may add Bing and Geng depending on the chart (「专用戊丙，次取庚金」).
These describe what one classical method looks for, given the season. They are not predictions, and other methods may weigh the same chart differently. Where schools disagree on a rule, see How we calculate your chart.
Is your Ren Water weak or strong?
Three questions decide it, in this order: season (the month branch), roots (Ren among the hidden stems, especially in 亥 Hai or 申 Shen), and support from other stems (more Water, or Metal as resource). Our calculator scores this with a published point method. Here are two Ren charts it produced:
A strong Ren: Chicago, 20 December 1981, 10:00 (open)
- Day Master:
- Yang Water (Ren 壬) · Read more about Ren Water
- Strength:
- 82% · strong (8.2 of 10 points)
Born with month branch Zi 子, when Water is in a supportive season on our reading, with roots / companions visible in the pillars (辛酉 庚子 壬申 乙巳). Score: 82%, strong (8.2 of 10 points).
A weak Ren: Chicago, 7 June 1986, 10:00 (open)
- Day Master:
- Yang Water (Ren 壬) · Read more about Ren Water
- Strength:
- 13% · weak (1.3 of 10 points)
Born with month branch Wu 午, when Water is out of its best season on our reading, with limited support among the stems and hidden stems (丙寅 甲午 壬午 乙巳). Score: 13%, weak (1.3 of 10 points).
For what weak and strong mean in general, see Weak Day Master and Strong Day Master. The hidden stems page explains the roots table behind those scores.
Favourable elements. Which element a Ren chart is said to "need" depends on its season, its strength and the reader's method, so there is no single answer for all Ren Day Masters. Our calculator doesn't output a favourable element.
How Ren interacts with the other nine stems
The Yuanhai Ziping names the Ten Gods using Jia as its example, then the same generating / controlling logic is shifted to any Day Master. So for a Ren Day Master:
| Stem | Element | Relation to Ren | Ten God | Notes |
|---|---|---|---|---|
| 甲 Jia | Yang Wood | Ren produces it | Eating God (食神) | |
| 乙 Yi | Yin Wood | Ren produces it | Hurting Officer (傷官) | |
| 丙 Bing | Yang Fire | Ren controls it | Indirect Wealth (偏財) | |
| 丁 Ding | Yin Fire | Ren controls it | Direct Wealth (正財) | Combines with Ren (壬丁合) |
| 戊 Wu | Yang Earth | Controls Ren | Seven Killings (七殺, also 偏官) | |
| 己 Ji | Yin Earth | Controls Ren | Direct Officer (正官) | |
| 庚 Geng | Yang Metal | Produces Ren | Indirect Resource (偏印; also 倒食, 梟神) | |
| 辛 Xin | Yin Metal | Produces Ren | Direct Resource (印綬, i.e. 正印) | |
| 壬 Ren | Yang Water | Same element, same polarity | Friend (比肩) | |
| 癸 Gui | Yin Water | Same element, opposite polarity | Rob Wealth (劫財) |
Ren and Ding combine. Ding–Ren is one of the five standard stem combinations. Our calculator doesn't model combinations.
Ren and fire. Water controls Fire — for a Ren Day Master, fire is wealth. Whether that wealth helps depends on strength and season.
Ten Gods are labels relative to the Day Master, not personality verdicts. For the naming logic in general, see How we calculate your chart.
Common misconceptions about Ren Water
- "Ren is my zodiac year element." Day Master ≠ year stem.
- "Ren people are all free-spirited wanderers." The river image describes the stem, not the person.
- "Earth is always bad for Ren." When Ren is strong (autumn/winter examples above), the Qiongtong Baojian often takes Wu earth as the main adjustment. Season decides.
- "Ren is the ocean." A modern memory aid. The classical notes speak of rivers, rain and dew; "ocean" is a popular gloss.
How modern readers describe Ren Water
Modern guides often associate Ren with breadth, mobility and generosity, extending the river image. Some also mention lack of boundaries. These are interpretations built on the classical image, not statements from the classical texts. You may recognise yourself in them or not. Neither result says anything about what will happen to you.
Frequently asked questions
Is Ren Water yin or yang?
Yang. Ren is Yang Water, and its yin partner is Gui.
What element is good for a Ren Water Day Master?
It depends on the season and the chart's strength. There is no single answer. The Qiongtong Baojian recommendations above are one classical climate method; a strength-based reading would favour resource and companions for a weak Ren, and output, wealth and power for a strong one. Our calculator doesn't output a favourable element.
Which stem combines with Ren?
Ding (丁, Yin Fire). Ren–Ding is one of the five classical stem combinations.
Is a Ren Water Day Master the same as being born in a Water year?
No. A Water year means the year stem is one of the two Water stems. A Ren Day Master means the day stem is Ren. You can have either without the other.
How do I find out if my Day Master is Ren?
Use the Day Master calculator. You only need your birth date (and whether you were born between 23:00 and midnight). The full chart also shows whether your Ren is weak or strong.
Why do some sites call Ren a "river" or "ocean"?
Modern memory aids for yang water. The Di Tian Sui speaks of linking rivers and flowing without stagnating; commentary adds hundred rivers / rain and dew.
Next steps: Calculate your full chart to see your Ren's season, roots and strength score, or read about the hidden stems that give it roots.
Related
What is my Day Master?: all ten stems
Example charts you can audit · Ten Gods · Learn where to start
Sources
- Di Tian Sui Chanwei (滴天髓闡微), "天干論", verse on Ren, Chinese Text Project: https://ctext.org/wiki.pl?if=gb&chapter=126492
- Di Tian Sui (滴天髓), 輯要 edition with notes, Wikisource: https://zh.wikisource.org/wiki/滴天髓
- Ziping Zhenquan Pingzhu (子平真詮評註), yin–yang pairing of stems, Chinese Text Project: https://ctext.org/wiki.pl?if=gb&chapter=974137
- Yuanhai Ziping (淵海子平), Ten Gods naming logic, Wikisource: https://zh.wikisource.org/wiki/淵海子平
- Sanming Tonghui (三命通會), 卷二, seasonal states, Wikisource: https://zh.wikisource.org/wiki/三命通會/卷二
- Qiongtong Baojian (穷通宝鉴), Ren seasonal sections (正月壬水 and related), Wikisource: https://zh.wikisource.org/wiki/穷通宝鉴
- Example charts: computed by our engine (
bazi-lichun-jieqi-tst-v1); see How we calculate your chart
Translations: PillarChart editorial team.
BaZi is a traditional Chinese cultural practice. This page describes what classical texts and practitioners say; it is for reflection, education and entertainment, and is not medical, legal, financial or psychological advice. Different schools may read the same chart differently.
Last updated: 2026-10-07