BaZi Basics
BaZi Compatibility Basics
How BaZi compatibility is read: Day Master relations, day-branch interactions, mutual useful elements and timing — and why compatibility is not a pass/fail score.
BaZi Calculator · 2026/10/13
The twelve growth stages (十二长生) describe the life cycle of each element through the branches. Learn the stages, the full table, and how to use them without overreading.
By BaZi Calculator · Updated 2026/10/13
The twelve growth stages (十二长生) describe how a stem's energy rises and falls as it moves through the twelve branches — from birth, through peak, to storage and conception. They are a compact way to read how comfortable a stem is in a given branch.
| Stem \ branch | 子 | 丑 | 寅 | 卯 | 辰 | 巳 | 午 | 未 | 申 | 酉 | 戌 | 亥 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 甲 | Bathing | Capping | Coming of Age | Peak | Decline | Sickness | Death | Tomb | Extinction | Conception | Nurture | Birth |
| 乙 | Sickness | Decline | Peak | Coming of Age | Capping | Bathing | Birth | Nurture | Conception | Extinction | Tomb | Death |
| 丙 | Conception | Nurture | Birth | Bathing | Capping | Coming of Age | Peak | Decline | Sickness | Death | Tomb | Extinction |
| 丁 | Extinction | Tomb | Death | Sickness | Decline | Peak | Coming of Age | Capping | Bathing | Birth | Nurture | Conception |
| 戊 | Conception | Nurture | Birth | Bathing | Capping | Coming of Age | Peak | Decline | Sickness | Death | Tomb | Extinction |
| 己 | Extinction | Tomb | Death | Sickness | Decline | Peak | Coming of Age | Capping | Bathing | Birth | Nurture | Conception |
| 庚 | Death | Tomb | Extinction | Conception | Nurture | Birth | Bathing | Capping | Coming of Age | Peak | Decline | Sickness |
| 辛 | Birth | Nurture | Conception | Extinction | Tomb | Death | Sickness | Decline | Peak | Coming of Age | Capping | Bathing |
| 壬 | Peak | Decline | Sickness | Death | Tomb | Extinction | Conception | Nurture | Birth | Bathing | Capping | Coming of Age |
| 癸 | Coming of Age | Capping | Bathing | Birth | Nurture | Conception | Extinction | Tomb | Death | Sickness | Decline | Peak |
Yang stems move forward through the branches; in the most widely used convention yin stems move backward, which is why 乙 is born in 午 rather than 亥. Some schools instead give yin stems the same stages as their yang partner — check which convention a source uses.
Growth stages are a summary, not a substitute for analysing hidden stems and season. A stem at "death" may still be rooted through other branches; a stem at "birth" may be clashed away. Use the stages to orient, then check the details.
Each yang stem is born (长生) in a growth branch and peaks (帝旺) in a cardinal branch:
| Stem | 长生 Birth | 临官 Coming of age | 帝旺 Peak | 墓 Tomb |
|---|---|---|---|---|
| 甲 | 亥 | 寅 | 卯 | 未 |
| 丙 | 寅 | 巳 | 午 | 戌 |
| 戊 | 寅 | 巳 | 午 | 戌 |
| 庚 | 巳 | 申 | 酉 | 丑 |
| 壬 | 申 | 亥 | 子 | 辰 |
The pattern is regular: each element is born in the branch of the element that produces it (water 亥 for wood, wood 寅 for fire, earth-following-fire 寅 for 戊, fire 巳 for metal, metal 申 for water), comes of age in its own seasonal growth branch, peaks at the season's centre and is stored in the storage branch of its three-harmony group. 戊 earth follows fire in the most common convention; some schools instead have earth follow water.
In the convention used here, yin stems count backward: 乙 is born in 午 and peaks in 寅; 丁 and 己 are born in 酉; 辛 in 子; 癸 in 卯. The glossary entry summarises both conventions.
The stages connect directly to the three-harmony groups. Wood's three harmony is 亥卯未: birth, peak and tomb. Fire's is 寅午戌, metal's 巳酉丑, water's 申子辰. A three-harmony group is the life cycle of one element compressed into three branches, which is why it is such a strong concentration.
Most practitioners use only part of the cycle in daily reading:
The remaining stages fill in nuance. Reading every stage literally — for example taking 死 as death — is a misreading; the names are metaphors for the strength of qi.
If the stages and the hidden-stem roots agree, your strength assessment is on firm ground. If they disagree — common with yin stems under the backward convention — trust the hidden stems and season.
The stages are not only for the Day Master. You can ask how comfortable any stem is in its own branch: 甲 over 寅 sits on its coming-of-age branch; 庚 over 午 sits at its bath stage and is controlled by the fire in 午. This kind of check helps judge which visible stems are reliable.
Why is 戊 grouped with fire? In the most common convention earth follows fire because fire produces earth.
Do stages change the Ten Gods? No; they describe strength, not relationship.
Are tomb branches bad? No; they store an element that can be released at the right time.
A quick way to use the stages is to write the Day Master's stage under each of the four branches. A chart reading "帝旺, 衰, 长生, 墓", for example, shows a strong seasonal position and a supportive seat, while "绝, 胎, 死, 病" shows little support from any branch. Check the result against roots from the hidden stems calculator; when both point the same way, you can describe the chart's strength with confidence.
Take a 丙 fire Day Master with branches 寅 (year), 子 (month), 午 (day) and 戌 (hour). Using the table:
The stages say: weak by season, strong by seat, supported by a birth branch and a storage branch. The hidden stems confirm it — 寅, 午 and 戌 all contain fire, and together they form the 寅午戌 fire group. A reader would therefore not call this Day Master weak despite the winter month; it is probably balanced to strong, which changes the useful element entirely. This is exactly how the stages help: they flag a pattern that a seasonal glance alone would miss.
The Day Master's stage in each luck branch gives a quick sense of the decade's support. Our 丙 example would be at 临官 in a 巳 luck pillar and at 绝 in a 亥 luck pillar. Practitioners do not read 绝 as disaster; they read it as a decade where the Day Master relies on what it already has. Check these stages in the luck pillar calculator output.
Used this way, the stages are a compact summary that points you to the right questions. They do not replace a full analysis, and readers who take the names literally will misread charts.
Next: reading annual pillars.
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