Mao (卯) Earthly Branch: the Rabbit, Yin Wood, and What It Means in Your Bazi Chart

一 What Mao (卯) Actually Is

Mao 卯 is the fourth of the twelve [[earthly branches]], a yin Wood branch whose animal is the Rabbit. For the underlying framework, see Earthly Branches in Bazi: The Twelve Characters and Their Hidden Stems.

Mao hides exactly one [[hidden stem]]: 乙 Yǐ, Yin Wood, at full weight. This makes it one of only three "pure" branches — alongside Zi 子 (which hides only 癸 Water) and You 酉 (which hides only 辛 Metal). When you encounter Mao in a chart, you are looking at concentrated, undiluted Wood with no secondary elements mixed in.

The 2nd solar month that Mao governs is the peak of spring. Where Yin 寅, the branch that precedes it, represents the aggressive burst of new wood breaking through frozen ground — a tree trunk cracking open the earth — Mao is the quiet spread of growth that follows. Think of ivy covering a wall, meadow grass thickening across a field, wildflowers opening without fanfare. The force is no less powerful, but it advances by filling in rather than breaking through.

Within the twelve-stage cycle of Wood's development, Mao occupies the [[帝旺]] (emperor/peak) position. This is Wood at maximum strength — not still growing, not yet declining, but at its absolute zenith. Every other branch that contains Wood holds it in a rising or falling phase. Mao holds it at the top.

二 Where to Find Mao in Your Chart

A [[Four Pillars]] chart arranges eight characters in four columns (the pillars) and two rows. The top row holds the [[heavenly stems]]; the bottom row holds the earthly branches. Mao can appear in any of the four branch positions:

• Year branch — You were born in a Rabbit year (e.g., 1987, 1999, 2011, 2023).
• Month branch — You were born during the 2nd solar month, from the 惊蛰 Jingzhe solar term to just before 清明 Qingming. This falls roughly in March on the Western calendar, though exact dates shift by a day or two each year. This is peak spring — the strongest Wood month of the year.
• Day branch — The day you were born falls on one of the sixty [[Jiazi]] cycle days that pairs with 卯. This repeats every twelve days and has nothing to do with the calendar month.
• Hour branch — You were born between 05:00 and 07:00 in [[true solar time]] (adjusted for your birth longitude, not the clock on the wall). Dawn — the moment the world wakes up.

三 How to Read Mao

Knowing where Mao appears is the first step. What it means for your specific chart depends on how its hidden stem relates to your [[Day Master]] — the heavenly stem sitting atop your day pillar. The method is easier to compare with Yin (寅) Earthly Branch: the Tiger, Yang Wood, and What It Means in Your Bazi Chart.

The hidden stem and your Day Master

Mao's single hidden stem is 乙 (Yǐ, Yin Wood). To interpret it, you calculate the [[ten god]] relationship between 乙 and your Day Master. Because Mao contains only one stem at full weight, the resulting ten god arrives at maximum strength with no dilution — the same concentrated quality that Zi and You share. Here are several common pairings:

Compare this clarity to a branch like Chen 辰, which hides three stems at fractional weights — its influence scatters across multiple ten god categories. Mao puts all its weight behind a single one. You know exactly what you are getting.

Pillar position matters

The same ten god reads differently depending on which pillar Mao occupies:

• Year branch — Ancestry, grandparents, early childhood. Mao here colors the family background you were born into, lending it a quality of Wood: growth, education, or a nurturing environment.
• Month branch — Career, social standing, the world you operate in during adulthood. Mao as month branch is especially potent because it is also the literal month indicator: you were born in the peak of Wood season. The element is not just present — it is in season and at maximum strength. This is the strongest possible placement for Wood energy in the entire chart.
• Day branch — The self, the spouse, the inner world. Mao here sits directly beneath your Day Master and often describes the dynamics of your closest relationship.
• Hour branch — Children, aspirations, the later phase of life. Mao here points toward legacy and the direction your energy flows in your final decades, colored by gentle, persistent Wood.

Wherever Mao appears, it brings concentrated yin Wood — flexible, persistent, quietly powerful. A chart with Mao is never Wood-neutral.

四 When Mao Plays Out Differently

No branch operates in isolation. Its behavior shifts depending on which other branches share the chart. Here are five key interactions involving Mao, each verifiable by checking the branch relationships in the calculator. This point connects directly with Chen (辰) Earthly Branch: the Dragon, Yang Earth, and What It Means in Your Bazi Chart.

1. Mao-Xu (卯戌) six harmony — Wood drawn toward Fire

When Mao and Xu 戌 appear in adjacent pillars, they form one of the [[six harmony]] pairs. This combination transforms toward Fire — Wood (Mao) feeds Fire, aided by Xu's hidden 丁 (Yin Fire). The result is that Mao's concentrated Wood identity gets pulled in a different direction: instead of reinforcing Wood, its energy is being channeled into Fire output. This is one of the six harmonies whose elemental transformation is most clearly felt. If your chart depends on Mao for Wood-related ten gods (Resource for a Fire Day Master, for instance), the presence of Xu next door redirects that contribution toward Fire, potentially changing what Mao actually delivers.

2. Hai-Mao-Wei (亥卯未) three harmony — the Wood bureau

When Hai 亥, Mao 卯, and Wei 未 all appear among the four branch positions, they form the [[three harmony]] Wood bureau. This is the most concentrated Wood formation possible — all three branches lock together and push the chart's Wood total to its maximum. Mao is the center of this trio (the "emperor" position), the branch that defines the element. Hai brings Water that nourishes Wood; Wei brings Earth that stores residual Wood. Together, they create an overwhelming Wood presence. If your chart contains Hai-Mao-Wei, Wood is not just present; it dominates.

3. Mao-You (卯酉) clash — pure Wood versus pure Metal

Mao (Wood) and You 酉 (Metal) sit directly opposite each other in the branch circle, forming a [[six clash]]. What makes this clash distinctive is that both branches are "pure" — single hidden stem, full weight. Mao hides only 乙 (Yin Wood); You hides only 辛 (Yin Metal). There are no secondary elements to absorb the impact or muddy the interaction. It is the cleanest, most decisive of the six clashes: Metal chops Wood, Wood resists Metal, and one side must give. Which branch prevails depends on seasonal strength and visible stem support.

4. Zi-Mao (子卯) punishment — support that becomes interference

The Zi-Mao pairing is one of the classical [[punishment]] formations, called the "punishment of incivility" (无礼之刑). On the surface, Water (Zi) produces Wood (Mao) — this should be a nurturing relationship. But in the punishment reading, the support goes too far: Water floods Wood rather than feeding it. Too much nourishment spoils. The classical interpretation is that generosity curdles into meddling, or that a relationship built on kindness develops an unhealthy imbalance. Look for this when Zi and Mao appear together, particularly in adjacent pillars.

5. Mao-Chen (卯辰) harm — slow corrosion, not dramatic collision

Unlike the sudden impact of a clash, the Mao-Chen 辰 [[harm]] operates as a slow, grinding friction between Wood and Earth. Mao's Wood pushes against Chen's Earth storage, neither side breaking the other but both wearing down over time. In chart interpretation, this often shows up as a situation that is not catastrophic but persistently uncomfortable — an arrangement that erodes stability rather than shattering it.

五 Real Charts

Chart A — Mao as month branch, strong Wood season

Mao in the month branch places concentrated Wood ([[Rob Wealth]]) squarely in the career and social pillar. The month stem 己 ([[Direct Wealth]]) sits on top of Mao, creating a stem-branch tension worth noticing: Earth controlling Wood from above, while Wood pushes upward from below. In practical reading, this Day Master's career environment holds both competition (Rob Wealth from Mao's hidden 乙) and real earning potential (Direct Wealth from 己) at the same time.

The hour branch Yin 寅 adds more Wood through its hidden 甲 (Friend), and together with Mao and the Chen 辰 year branch, the chart is rich in Wood energy. But it falls one branch short of the Hai-Mao-Wei Wood [[three harmony]] — 亥 Hai is missing. If a Hai arrives in a [[luck pillar]] or annual pillar, the full Wood bureau locks in and Wood becomes the chart's ruling force.

Meanwhile, the day branch Zi 子 provides steady Water ([[Direct Resource]]) feeding the 甲 Day Master from below. This is a Day Master that is both nourished (Water from Zi) and contested (Wood competition from Mao) — well-supported but not unchallenged. The 庚 Seven Killings in the year stem supplies the pressure and discipline that keeps the chart from drifting into passivity.

Chart B — Mao-Xu six harmony transforming Wood to Fire

This chart's defining feature is the [[six harmony]] between Mao in the month branch and Xu 戌 in the year branch — the 卯戌合火 combination. The harmony transforms toward Fire: Mao's Wood feeds Fire, and Xu's hidden 丁 (Yin Fire) along with the year stem 丙 ([[Eating God]]) both support the Fire direction. This means Mao's pure Wood nature is being drawn away from Wood and redirected toward Fire — the Day Master's output element.

Whether the transformation fully completes depends on seasonal support and whether Fire has strong stem backing elsewhere. In this chart, the visible 丙 on top of 戌 and the hidden 丁 inside 戌 both argue in Fire's favor. If the transformation holds, the chart's output energy (Eating God and Hurting Officer — the creative and expressive ten gods) gains strength at the expense of the pure Wood contribution Mao would otherwise provide.

Notice the day branch Shen 申. It does not clash with Mao directly — Mao's clash partner is You 酉, not Shen. Instead, Shen introduces a strong Metal presence (hidden 庚, [[Seven Killings]]) that pressures the Day Master from a different angle. The hour branch Zi 子 provides Water ([[Direct Resource]]) that feeds the 甲 Day Master, creating a productive cycle flowing from Metal (Shen) through Water (Zi) into Wood (the Day Master) and onward into Fire (the Mao-Xu transformation). The chart tells a coherent story of energy moving in one direction.

六 How Common Mao Is

Across all 518,400 possible Four Pillars combinations, Mao (卯) appears as the day branch in 43,200 charts (8.3%), as the month branch in another 43,200 (8.3%), and in at least one of the four branch positions in approximately 152,375 charts (29.4%). These numbers are identical for every earthly branch — the sixty Jiazi cycle distributes the twelve branches evenly, so no branch is rarer or more common than any other.

What does vary is the combination of Mao with specific heavenly stems and the other branches in the same chart. The Mao-Xu six harmony requires both branches in adjacent pillars — a much narrower slice of the combination space. The full Hai-Mao-Wei three harmony demands all three branches land in the right positions, narrower still. And a Mao-You clash with both pure branches in opposition is a specific configuration that produces especially clear-cut readings precisely because neither branch has secondary elements to complicate the picture.