Literature Reference: Rain stains the grass by the sandy shore, while the wind drives ripples across the water. Source from 'Early Spring Reminiscing Wei Zhi'.
雨: The life-giving rain that nourishes all things.
染: Dye. To color. To keep the heart pure, signifying complete immunity from bad habits and corrupting influences. Also used to describe something extremely innocent and pristine.
Meaning: Rain moistens, nourishing all things, symbolizing freshness, purity, and vitality.