Literature Reference: 幸有用余俸，置居在西畴。—— 《南溪始泛三首 二》 Fortunately, there is some surplus salary to build a residence in the western fields. Source from 'South Creek Initial Floating, Part II'.
余: Surplus, a metaphor for a life of abundance and prosperity.
俸: The emoluments received by officials and the like.
Meaning: Surplus salary symbolizes abundant wealth and a worry-free life.