What is Lower Trigram?

The bottom three lines (lines 1, 2, 3) of a hexagram. Also called the inner trigram (內卦). Traditionally associated with the self, the inner situation, or one's own side. In Plum Blossom Numerology, it is the substance (體) trigram.

Source: Meihua Yishu (梅花易數), Shao Yong