XuanSeal is a BaZi (Four Pillars) reading platform that first calculates a chart from a birth date, birth time (or unknown time), and optional birthplace. The chart engine determines the pillars, Day Master, Five Elements, hidden stems, and luck cycles before AI writes the interpretation, so the prose is grounded in computed chart data rather than a generic prompt. Anyone can generate a free chart without signing up and inspect anonymized sample chapters. Paid web reports include the Book of Fate for natal and life-pattern analysis, the annual Fortune Book for year-ahead timing, and the Compatibility Book for comparing two charts. XuanSeal Master adds Daily Fortune and contextual Chinese Astrology Q&A. Available in English, Simplified Chinese, and Traditional Chinese. Readings are for cultural reflection and entertainment, not medical, legal, or financial advice.