HEAVEN & EARTH UNION · 天合地合
Yi Chou and Geng Zi Compatibility (乙丑 × 庚子)
Yi Chou and Geng Zi is one of the 30 Heaven & Earth Union pairings in the 60-pillar cycle — the configuration classical BaZi treats as a natural marriage match. The Heavenly Stems combine into Metal, and the two spouse palaces (Ox and Rat) form a six-harmony instead of competing.
Why the Attraction Is Real
To Yi Chou, Geng Zi's Day Master is your Direct Officer star — the other classical marriage star. This partner carries natural authority in your eyes: you respect them slightly before you love them, and their opinion of you matters more than you admit.
To Geng Zi, Yi Chou's Day Master is your Direct Wealth star — the classical marriage star. This partner feels like something you want to build with and protect: concrete, dependable, worth working for. Attraction here grows through acts of provision and follow-through rather than words.
This is the signature of the Heaven & Earth Union: the Direct Officer and Direct Wealth stars are the two classical marriage stars, each pointing at the other person. The relationship tends to formalize — this pairing drifts toward commitment rather than away from it.
The Spouse Palaces: Ox Harmonizes With Rat
In BaZi, the branch under each Day Master is that person's spouse palace — the seat the relationship actually lives in day to day. Zi and Chou are the quiet harmony — Rat and Ox. This is the pairing of late-night loyalty: not showy, but almost impossible to break from outside.
When these two palaces combine, the pairing produces Metal: structure — this pairing sharpens both people: clearer standards, cleaner decisions, mutual accountability. The risk is turning the marriage into a performance review.
Long-Term Verdict
On paper, Yi Chou and Geng Zi is a top-tier marriage configuration — but the union has a known failure mode: it is so structurally comfortable that both people can stop courting each other entirely. The The Nurturer (Yi Chou) and the The Warrior (Geng Zi) fit together without effort, and effort is what keeps long relationships alive. The couples who make this pairing extraordinary are the ones who keep choosing each other audibly, not just structurally.
Remember: the day pillars are the core of the comparison, but they are two characters out of sixteen. Element balance, the other palaces, and current luck cycles can soften a clash or strain a union.
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New to this? Start with the complete BaZi compatibility guide, or look up your own pillar in the 60 day pillars library.