笑魇如花梦魇如梦
[xiào yăn rú huā mèng yăn rú mèng]
'Smiles are as beautiful as flowers, nightmares are as unreal as dreams’. It contrasts the pure, attractive quality of genuine smiles with the ephemeral or illusionary nature of nightmares, implying life contains contrasting emotions that coexist beautifully yet mysteriously.