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Knowledge › Eastern › Vietnamese astrology

What Are the Eight Hạn in a Year, and Where Do They Come From?

The eight hạn of folk belief: Huỳnh Tuyền, Tam Kheo, Ngũ Mộ, Thiên Tinh, Toán Tận, Thiên La, Địa Võng, Diêm Vương. Which books record them, how they differ.

Updated 15 Oct 2026Traditional systems
Knowledge › Eastern › Vietnamese astrology

What Is Thiếu Âm in Tử Vi and How Is It Placed?

Thiếu Âm is the fourth star of the Thái Tuế ring, placed by the birth year branch. Placement and meaning in four Vietnamese Tử Vi books.

Updated 12 Oct 2026Traditional systems
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Order of the sixty Gua Qi hexagrams

The sixty hexagrams that take turns ruling the days under the Gua Qi method, in order from Inner Truth at the winter solstice, with their solar month, their rank (duke, sovereign, marquis, grand master, minister) and when each takes over counted from the solstice. The lookup table for the que-ngay-quai-khi-1900-2100 dataset.

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