yi-you day pillar

Two yin stems of opposed elements meet in this pair. The branch holds 辛 in the common table, metal that controls 乙 at the same polarity, which gives Seven Killings. 三命通會 卷二 says soft wood fears a different metal, 惧阳金斫伐为患, it fears the chopping of yang metal as a harm. Yang 庚 does show up for a week in that book's account of 酉, where from 乙 it reads as Direct Officer.

Because 乙 runs backward, its Extinction lands one branch away from the Extinction of 甲, which falls at 申. Both are empty seats before a new round, and the forward and reverse counts simply reach them from opposite sides.

The second half of 井泉水 has little to do with wells in this book. 三命通會 卷一 has 阴壑水, water in a shaded gully, and 喜东方及南, pleased by east and south. Its label 破禄 may follow the same shape seen at 甲申, since 神峰通考 says 乙禄到卯, the salary seat of 乙 is at 卯, and 酉 faces 卯 across the circle, though the chapter gives no rule.