Sanming TonghuiVol. 1, On the Nature and Fortune of the Sixty Jiazi (verdicts & remarks)
Xin Chou Earth is graves and tombs; it delights in Wood, Fire, and spring. Canopy, Suspended Needle, Missing Character. The Earth of Xin Chou does not mind Wood, and the Wood of Wu Xu does not fear Metal. How is this discerned?
Chou contains the Metal storage, so Wood does not become a ghost; Xu contains Fire, so Metal suffers affliction instead.
In the case of Wu Xu Wood, two Earths lie above and one Wood lies below, buried beneath the two Earths before it can sprout, its form unseen; this is a state where Earth flourishes and Wood is weak. All others follow this principle.