What is Later Heaven Sequence?

The trigram arrangement attributed to King Wen, representing the practical, manifest world. Trigrams are mapped to compass directions: ☲ Li (south), ☵ Kan (north), ☳ Zhen (east), ☱ Dui (west). This sequence is the basis for feng shui, directional analysis, and the almanac's spatial calculations. It complements the Earlier Heaven cosmological order.

Source: Shuogua Zhuan (說卦傳)