“King Wen Later Heaven” is one of the many ways how to attribute trigrams to phenomena of nature, the seasons, character traits, family relations, geographical directions etc.
Read more: https://en.wikipedia.org/wiki/Bagua#King_Wen_%22Later_Heaven%22
However, this system is not fully compatible with the five elements theory, because King Wen’s Later Heaven only considers the classical four seasons, and ignores late autumn as the fifth season with its corresponding fifth phase element earth. After careful consideration, I have made a few changes to the order of King Wen’s Later Heaven which I explain in detail here: Trigrams, Elements, Functional Circuits
