天上的彩虹是道伤
[tiān shàng de căi hóng shì dào shāng]
The literal meaning suggests the rainbow in the sky represents a scar. In Chinese poetry and prose, rainbows are traditionally symbols of hope or promise; this statement reverses the positive imagery into melancholy symbolism of wounds or sorrow hidden under apparent beauty, maybe pointing at personal hurts or pain behind smiles in life.