Chinese Zodiac Compatibility Chart Explained

A Chinese zodiac compatibility chart maps the relationships between the twelve Earthly Branches (the animal signs) using classical pairing rules: six harmonies, three harmonies, six clashes, and several lesser-known interactions like harm and punishment cycles. These charts give a quick read on which animal signs tend toward cooperation and which tend toward friction. They are widely consulted for romantic matches, business partnerships, and family dynamics across Chinese-speaking cultures. But they carry a structural limitation worth understanding before you rely on one.

The Twelve Branches and How They Pair

Each Chinese zodiac animal corresponds to one of the twelve Earthly Branches. The Rat is Zi, the Ox is Chou, the Tiger is Yin, and so on through the Pig at Hai. When compatibility charts talk about "Rat and Ox harmony" or "Rat and Horse clash," they are describing relationships between these branches, not the animals themselves. The animal imagery is a mnemonic layer on top of a calendrical system.

Compatibility charts organize branch interactions into a few major categories.

Six Harmonies (Liu He)

The six harmonies are one-to-one pairings where two branches combine with particular affinity. There are exactly six pairs:

• Rat (Zi) and Ox (Chou)
• Tiger (Yin) and Pig (Hai)
• Rabbit (Mao) and Dog (Xu)
• Dragon (Chen) and Rooster (You)
• Snake (Si) and Monkey (Shen)
• Horse (Wu) and Goat (Wei)

In classical Chinese astrology, a Liu He pairing suggests natural rapport, mutual support, and ease of cooperation. The two branches are said to combine into a shared elemental quality. For example, Rat and Ox combine toward Earth; Snake and Monkey combine toward Water. This elemental transformation matters in BaZi analysis because it can alter the effective element balance in a chart.

Compatibility charts typically mark these six pairs as the strongest positive matches.

Three Harmonies (San He)

The three harmonies group the twelve branches into four triangles of three, based on shared elemental affinity:

• Water frame: Monkey (Shen), Rat (Zi), Dragon (Chen)
• Fire frame: Tiger (Yin), Horse (Wu), Dog (Xu)
• Metal frame: Snake (Si), Rooster (You), Ox (Chou)
• Wood frame: Pig (Hai), Rabbit (Mao), Goat (Wei)

Within each triangle, the three branches share a directional and elemental resonance. Two people whose year branches fall in the same San He triangle are considered naturally compatible, though the bond is broader and less intense than a Liu He pairing. Think of San He as a shared wavelength; Liu He as a direct lock.

Six Clashes (Liu Chong)

The six clashes are the primary conflict pairings. Each branch clashes with the branch directly opposite it on the twelve-branch circle:

• Rat (Zi) clashes with Horse (Wu)
• Ox (Chou) clashes with Goat (Wei)
• Tiger (Yin) clashes with Monkey (Shen)
• Rabbit (Mao) clashes with Rooster (You)
• Dragon (Chen) clashes with Dog (Xu)
• Snake (Si) clashes with Pig (Hai)

A clash indicates opposing energies. In compatibility charts, these pairs are flagged as difficult. In practice, a clash between year branches does not doom a relationship. It signals areas of tension, competing priorities, or different temperaments that require conscious navigation.

Clashes also appear in BaZi when branches from different pillars (year, month, day, hour) oppose each other within a single person's chart, or when a luck period branch clashes with a natal branch. The concept extends well beyond romantic pairing.

Lesser Interactions: Harm, Punishment, Destruction

Most compatibility charts stop at harmonies and clashes. Classical branch theory includes additional layers:

• Six Harms (Liu Hai): Pairs that undermine each other subtly. Rat and Goat, Ox and Horse, Tiger and Snake, Rabbit and Dragon, Monkey and Pig, Rooster and Dog. Harm relationships suggest hidden friction or emotional drain rather than open conflict.
• Three Punishments (San Xing): Groups of branches that create internal tension when they appear together. The most cited are the "ungrateful punishment" (Yin-Si-Shen: Tiger, Snake, Monkey) and the "bullying punishment" (Chou-Xu-Wei: Ox, Dog, Goat).
• Destruction (Po): Another set of pairings indicating disruption, less commonly referenced in popular charts.

These interactions add nuance, but they also illustrate a problem: the same two branches can simultaneously be in a harm relationship and a partial three-harmony relationship. Context matters, and a flat compatibility chart cannot resolve those tensions.

The Year-Branch Limitation

Here is where most compatibility charts run into a wall. They use only the year branch, which is the zodiac animal determined by your birth year. But in BaZi, every person has four branches: year, month, day, and hour. The day branch, sometimes called the "Day Master's spouse palace," is considered more relevant to romantic compatibility than the year branch in classical practice.

Two people born in the same year share the same year branch. A compatibility chart based on year alone would say they are identical in compatibility profile, which is obviously insufficient. A Rat born in January and a Rat born in August have different month branches, likely different day branches, and potentially very different elemental balances.

The year branch tells you something about generational energy and broad social style. It does not tell you much about how two specific people interact at a personal level.

For a more detailed look at where zodiac pairing ends and chart-level analysis begins, see Chinese Zodiac Compatibility vs. BaZi Compatibility.

What a Birth Chart Compatibility Reading Adds

When you move from a zodiac compatibility chart to a birth chart comparison, several things change:

1. All four pillars are considered, with the year treated as one layer.

2. The day stem (Day Master) reveals each person's core elemental identity.

3. The interaction between one person's branches and the other's branches can be mapped in detail: where do harmonies land, where do clashes land, and which life areas (career, family, emotions) are affected.

4. Elemental balance between two charts shows where one person supplies what the other lacks, or where both have excess in the same element.

Zi Wei Dou Shu, the other major Chinese chart system, takes a different structural approach. It maps stars across twelve life palaces based on birth data, and compatibility can be assessed by comparing how each person's star placements interact with the other's palace positions.

Both systems require exact birth data: year, month, day, and ideally hour.

If you want to move beyond the year-branch grid, the birth chart compatibility calculator on this site computes a Zi Wei Dou Shu comparison using two complete birth charts. It is a different depth of analysis than a twelve-animal grid can offer.

For broader context on romantic pairing through the zodiac lens, Chinese Zodiac Love Compatibility covers the cultural background and common pairing advice.

When Compatibility Charts Are Still Useful

Dismissing zodiac compatibility charts entirely would be overcorrecting. They serve a few practical purposes:

• Quick cultural reference. If someone's grandmother asks about the match, the chart gives a shared vocabulary.
• Pattern recognition. The six harmonies and six clashes encode real observations about temperamental contrasts and affinities, even if they are painted in broad strokes.
• Entry point. Many people encounter Chinese astrology through these charts and then move toward deeper systems like BaZi or Zi Wei Dou Shu as their curiosity grows.

The chart is a map at continental scale. Useful for orientation, limited for navigation.