Literature Reference: 君问归期未有期，巴山夜雨涨秋池。—— 《夜雨寄北》 You ask when I will return, but I know not; the night rain fills the autumn pools of Bashan. Source from 'Night Rain Sent North'.
夜: The original meaning: The time from dusk till dawn, also used to depict mystery.
雨: The life-giving rain that nourishes all things.
Meaning: Night rain symbolizes deep emotions and longing, representing introspection, affection, and tranquility.