Sanming TonghuiVol. 1, On the Nature and Fortune of the Sixty Jiazi (verdicts & remarks)
Geng Yin Wood represents the trunk and knots of the pine and cypress; it delights in autumn and winter. Broken Salary and Horse, Mutual Punishment, Cane Punishment, Deaf and Mute. Geng Yin Wood and Ding Si Earth do not mind the ghosts of Metal and Wood.
When Metal reaches the Yin palace, though it acts as a ghost, it is extinct in Yin, and therefore does not become a ghost; when Wood reaches the Si palace, Si contains engendering Metal that overcomes Wood, and therefore it does not become a ghost.
Yet if Geng Yin Wood encounters Ren Shen Metal, they Clash and suffer subjugation. All others follow this principle.
The Earth of Geng Wu rides the flourishing southern Fire to nourish its form; the Earth of Wu Shen is self-engendering, and the Earth of Geng Zi is self-replete—none of them dread the Wood ghost.
For Wood dies at Wu, becomes extinct at Shen, and meets defeat at Zi; how then could it harm an Earth that is inherently strong? All others follow this principle.