Literature Reference: 长淮浪高蛟龙怒，十年不见来何时。—— 《乾元中寓居同谷县作歌七首 四》 杜甫 The waves of the Huai River rise high as dragons roar in anger, and ten years have passed since we last met. Source from 'Seven Songs of Living in Tonggu County During the Qianyuan Era' by Du Fu.
长: Strengths, merits.
淮: The Huai River, a vital waterway in Chinese culture.
Meaning: The long Huai River symbolizes vastness, depth, and strength.