What is my useful god?
The useful god (用神) is the element a chart most needs supported — what other sites call your "lucky element". There is more than one way to find it: 扶抑 (support and restrain), 调候 (climate), 通關 (bridging) and 病藥 (ailment and cure). They are different methods from different works and they do not always agree. Most sites give you one letter and do not say which method produced it. This one runs all four, reports each separately with its source, and where they disagree it says so rather than averaging them.
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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.