Which birth data a chart needs, and why leap-month, hour and day-boundary settings change the result.
Match the fields of a chart-casting form to the placement steps of Zi Wei Dou Shu Quan Shu: lunar year, month, day, double-hour, sex and birthplace each drive a different step, and each error moves something different.
Read first: What is Zi Wei Dou Shu? A first guide to palaces and stars
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