Literature Reference: 天下无双。—— 《史记·淮阴侯列传》 Unmatched under heaven. Source from 'Records of the Grand Historian: Biography of the Marquis of Huaiyin'.
无: No, it's clean, won't happen.
双: Two, a pair. Symbolizing abundance. It signifies double happiness.
Meaning: Unparalleled and unmatched, symbolizing excellence and uniqueness.