Rooster and Snake Compatibility: One Metal Trio

A Metal half-combination — not a Six Harmonies pair

Each zodiac animal corresponds to one of the twelve Earthly Branches (地支) — the symbolic markers used in the traditional Chinese calendar and in BaZi, a birth-chart system built from a person’s year, month, day, and hour of birth. Words like “harmony,” “clash,” and “harm” below are the technical names classical texts give to specific branch relationships; they are not literal predictions that a couple will be harmonious or will clash. This page checks Rooster and Snake against the same seven branch-relationship schemes used across this site’s other pairing pages: Three Harmonies, Three Meetings, Six Harmonies, Six Conflicts, Six Harms, Punishments, and Mutual Breaks.

What a Three Harmonies trio actually is: a metal life-cycle, not two tidy signs

Most Rooster-and-Snake write-ups explain the match by stacking personality adjectives — both intelligent, both stylish, both goal-oriented — and leaving it there. The classical reason the two branches are grouped at all is more specific, and it has nothing to do with temperament.

In the Four Pillars framework, each of the five elements is imagined moving through a life cycle across the twelve branches: it is born, grows, peaks, weakens, and is finally stored away. Three of those stages are the load-bearing ones — birth (长生, chángshēng), peak (帝旺, dìwàng), and tomb or storehouse (墓, mù). A Three Harmonies trio is simply the three branches that hold those three stages for one element. The three-stage vocabulary above — 长生, 帝旺, 墓 — is later Four Pillars and calendrical terminology. An earlier version of the same three-branch pattern already appears in the Han-era Huainanzi (淮南子, 2nd century BCE), using an older vocabulary of 生, 壯, 死: 金生於巳，壯於酉，死於丑, “metal is born at Si (Snake), strongest at You (Rooster), and ends at Chou (Ox).” Later Four Pillars doctrine formalizes that pattern into the modern three-stage terminology. For metal, that is:

So the metal trio isn’t three signs that happen to get along. It is one element’s rising-and-resting arc, split across three branches. Snake and Rooster are the first two of those three: the birth of metal and the peak of metal. This is a statement about a life-cycle position, not about the branches’ own fixed elements — in another classical scheme Snake’s own branch reads as fire and Rooster’s as metal, but the trine describes where metal rises and rests across the calendar, not what each animal “is.” That shared metal current — not a checklist of shared traits — is what the tradition points to when it groups them.

Why 巳酉 is called a 生旺半合 — and what that does not mean

When only two of a trio’s three branches are present, later and contemporary BaZi terminology treats it as a half-combination (半合, bàn hé). Later BaZi practice further sorts these two-branch groups by which stages they cover. In the later BaZi terminology used here, 巳酉 is a 生旺半合, a “birth-and-peak” half-combination: 巳 supplies the birth position (长生) and 酉 supplies the peak (帝旺). That differs from 酉丑, which joins the peak (帝旺) and the storage position (墓) and is commonly called a 旺墓半合. Both include 酉, so including the peak branch alone does not define a 生旺半合 — the specific pair of stages is what the label is naming. This sorting is standard in later and contemporary BaZi practice; it is not a fixed ranking stated in the early classical sources.

That label describes the structure — which two of metal’s three life-cycle stages the pair holds — and nothing more. Later BaZi commentary sometimes calls the peak-inclusive variants comparatively strong, but the label by itself does not establish successful transformation into Metal in a full chart, a favorable outcome in someone’s birth reading, or a compatibility verdict between two people. It is also the honest limit on the claim: 巳酉 is a half of a three-branch group, not a self-contained two-branch bond like a Six Harmonies pair. Ox is not optional for the full trine.

First, make sure these are really your two signs

A pairing reading is only about the right two signs if each birthday is placed in the correct zodiac year — and the boundary is not January 1. For the lunar-zodiac convention this site uses, the animal year changes at Lunar New Year, which falls between about January 21 and February 20 depending on the year, so a birthday in January or early February can belong to the previous animal year. Someone born in mid-January 2017, for example, was born before that year’s Lunar New Year (January 28, 2017) and carries the previous year’s sign — Monkey — not Rooster.

Many BaZi practitioners instead start the astrological year at Lìchūn (立春), the solar term around February 3–5; Lìchūn has a precise clock time, so a birthday on the boundary day itself needs the exact birth time and place to resolve. If either person here has a January or early-February birthday, confirm the sign against a real date before reading the match — you can check both on the compatibility hub’s calculator.

Snake’s side: metal’s opening branch

Snake is the sixth of the twelve branches (巳), and this site’s Snake profile builds its reading around discretion, strategy, and a preference for working quietly behind the scenes. In the branch schemes: Rooster and Ox are Snake’s Three Harmonies partners (the metal trio); Monkey is its Six Harmonies match (巳申合); Pig is the sign it clashes with (巳亥冲); Tiger is its Six Harms partner (寅巳相害); Snake sits in the 寅巳申 punishment set with Tiger and Monkey; Monkey is also its Mutual Break partner (巳申破). Against Rooster specifically, the only link is the shared metal trio — Snake as the birth stage of metal, the branch that opens the cycle Rooster then brings to its peak. For a Snake pairing that runs on a completely different logic, see Snake with Monkey.

Rooster’s side: metal’s peak branch

Rooster is the tenth branch (酉), and this site’s Rooster profile centers on precision, candor, and a taste for order and appearances. In the branch schemes: Snake and Ox are Rooster’s Three Harmonies partners; Dragon is its Six Harmonies match (辰酉合); Rabbit is the sign it clashes with (卯酉冲); Dog is its Six Harms partner (酉戌相害); Rooster carries a self-punishment (酉自刑) rather than a punishment with another branch; Rat is its Mutual Break partner (子酉破). Against Snake specifically, the single link is again the metal trio — Rooster as 帝旺, the peak and center of the group, the branch whose presence gives the 巳酉 half-combination its 生旺 label. For a contrasting Rooster pairing, compare the full Rooster breakdown against all twelve signs.

What that leaves for the actual pairing

Keep the one real link clear rather than inflating it. Rooster and Snake are not a Six Harmonies pair, but they are also not simply “unrelated”: 巳酉 is a named two-branch half-combination within the metal Three Harmonies trio, and Ox is the third leg needed to complete that trio. Their shared membership in the 巳酉丑 metal trine is documented in the classical sources. Later BaZi terminology describes 巳酉 as a 生旺半合 — a birth-and-peak half-combination — because 巳 supplies the birth position and 酉 the peak. That identifies the structure; it does not by itself establish successful transformation into Metal, a favorable outcome in a full birth chart, or romantic compatibility between two people.

This site’s separate Snake and Rooster sign profiles describe personality-level traits — Snake as private and strategic, Rooster as exacting and outspoken — but that personality layer is not what the trine is describing. The trine is a statement about a shared metal current running through both branches. If a reader chooses to read the two profiles together anyway, Snake’s discretion and Rooster’s candor may be read as complementary or as a study in contrasts. That personality interpretation is separate from the classical fact that 巳 and 酉 occupy the birth and peak positions of the metal Three Harmonies configuration.

Common mistakes

• Flattening “not a Six Harmonies pair” into “no relationship at all”. Snake and Rooster are not a Six Harmonies pair, and they are not paired in Six Conflicts, Six Harms, Punishments, or Mutual Breaks either. But 巳酉 is still a named two-branch structure inside the Three Harmonies framework — the 生旺半合 half-combination of the metal trio. What is missing is the third leg (Ox), not any two-branch tie at all.
• Treating the half-combination as the full trine. The complete metal group is 巳酉丑 — Snake, Rooster, and Ox. Snake and Rooster alone are a half-combination; Ox is not optional for the whole trine, even though 巳酉 carries the 生旺半合 label because it holds both the birth and the peak stages.
• Reading the branches’ own elements into the trine. In one classical scheme the Snake’s own branch reads as fire and the Rooster’s as metal. The metal trine is a separate framework: it describes where metal is born, peaks, and is stored across the calendar, not what element each animal “is.”
• Explaining the match purely by shared personality. “Both smart, both stylish” is a modern trait-stacking gloss. The classical grouping rests on a shared five-element life-cycle stage (metal’s birth and peak), not on temperament — the personality reading comes from this site’s separate sign-profile pages.
• Assuming “no friction relationship” means guaranteed harmony. Snake and Rooster are simply not named together in Six Conflicts, Six Harms, Punishments, or Mutual Breaks. That is an absence within the seven schemes checked here, not a promise about two specific people.
• Reading a percentage score into any of this. Neither the trine nor the half-combination grading produces a number like “90% compatible.” That format is a modern convention layered on top of the classical system, not an output of it.

Read it for two real charts

Everything above is the general pattern for the sign pairing. If you want it for two specific people — not a generic reading — these go a step further:

Where to go next

Editorial note

The seven branch-relationship schemes checked here follow this site’s own reference pages: the metal Three Harmonies trio and the birth-peak-tomb (长生 / 帝旺 / 墓) logic behind it follow the Three Harmonies reference page and the five-element framework; Six Conflicts, Six Harms, and the other pairings follow this site’s enemies-and-friends reference page. The Three Harmonies structure itself is documented in early sources: the Han-era Huainanzi (淮南子, 2nd century BCE), in its astronomy (天文) chapter, places metal’s stages at exactly these branches — 金生於巳，壯於酉，死於丑，三辰皆金也 (“metal is born at Si, strongest at You, ends at Chou; these three branches all belong to metal”) — the birth-peak-tomb pattern later formalized as 三合. The treatment of 巳酉 as a 生旺半合 (“birth-and-peak half-combination”) and the ranking of half-combinations by relative strength are widely used in later and contemporary BaZi doctrine; this page does not present that later grading terminology as if it were stated in the early source quoted here. The 淮南子 passage was verified directly against the Wikisource text of that chapter. The four directional groupings that underlie Three Meetings (寅卯辰 eastern Wood, 巳午未 southern Fire, 申酉戌 western Metal, 亥子丑 northern Water) are documented in the Ming-dynasty Sanming Tonghui (三命通會). This page explains a cultural and classical lens on the Rooster-and-Snake pairing for interest and education. It is not a prediction, and not medical, financial, or relationship advice.