ji-si day pillar

己 is yin earth and 巳 a fire branch, so the seat feeds the stem. Counting 己 backward from 酉, this site arrives at Emperor in 巳, the peak of the twelve, where 三命通會 says things ripen as a person comes into full vigor. The placement is far from settled: 神峰通考 states 水土绝在巳, Extinction for earth at this very branch, and 五行大義 has earth at Crown and Belt. One pair can occupy three very different seats depending on the book.

All three hidden-stem tables name 庚, 丙 and 戊 for 巳, in different orders. From 己 these are Hurting Officer, Direct Resource and Rob Wealth. Hurting Officer is the position of the metal that earth produces at opposite polarity, and Rob Wealth is earth again at opposite polarity to the day stem.

大林木 is shared with 戊辰, and 三命通會 卷一 turns from the big timber to something smaller: 己巳木，山头花草, flowers and grasses on the hilltop. It adds 喜春及秋, pleased by spring and autumn. Two images, then, under one 納音 name.