Curious about how people in past centuries envisioned the I Ching hexagrams? Visit our RESOURCES page to see some examples of charts organized by trigrams or received order.
These handy diagrams were used to study characteristics and relationships between hexagrams, as mnemonics to help memorize hexagrams, and as hexagram finding aids.
The Nuclear Hexagram Chart by Qian Chengzhi (Qing dynasty) to the left is one example. Around the outside are the sixty-four I Ching hexagrams with their names, arranged by lower trigrams in the “Pre-heavenly” order (the same as the Fuxi/Shaoyong chart). The second ring inward are the nuclear hexagrams for the outer ring, formed from the inner four lines of the original hexagrams. The third ring repeats the process, in each case yielding one of the four “core” hexagrams.