Two charts side by side
Most sites give you a compatibility percentage. That number has no source: the word for matching two charts, He Hun (合婚), appears 0 times across all four classical works, and not one section is about pairing two people.
What the works do read is marriage from each person's own chart. So this page gives you two things: what the two sets of branches computably do to each other, and what each chart says about marriage on its own terms. Both charts are corrected to true solar time and the timezone in force that year.
No compatibility score. The word for matching two charts, He Hun (合婚), appears 0 times across all four source works. The reason is at the foot of the results.
Only know the two signs? See what the classics say about each pair of signs.
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Every reading here traces to a named text, and that much a machine can check. Whether any of it reads well is not something a machine can check — only a person can. If a passage made no sense, or read badly, or sounded like nonsense, say so plainly.
This form does not carry your birth details. What is stored is your message, whatever contact you chose to give, the page path with everything after the question mark cut off, and a visitor hash whose salt rotates daily — nothing tied to a chart, and nothing reversible to a person.