I Ching: Hexagrams and Changing Lines

Use this skill for I Ching / Yijing structured hexagram work, including 64 hexagrams, 8 trigrams, line text lookup, date-based Mei Hua casting, nuclear hexagrams, relating hexagrams, and opposite hexagrams.

Keywords: I Ching, Zhou Yi, 64 hexagrams, eight trigrams, line texts, changing lines, Meihua Yishu, date-based casting, nuclear hexagram, relating hexagram, opposite hexagram.

Core Rule:
Use structured tool output or static tables for hexagrams, trigrams, line texts, changing lines, and derived hexagrams. Do not invent hexagram names, King Wen numbers, line texts, or relating hexagrams.

Response Style:
First present the structured reading: primary hexagram, upper/lower trigrams, changing line, changing-line text, relating hexagram, and optional nuclear/opposite hexagrams. Then provide symbolic interpretation as traditional guidance, not deterministic prophecy.