笑声若不再动听
[xiào shēng ruò bù zài dòng tīng]
'Xiàoshēng ruò bùzài dòngtīng', meaning 'Laughter That Has Lost Its Pleasant Tone', can suggest nostalgia and longing for happy times that have faded, indicating a sadness or regret over the past, particularly moments once marked by joy and pleasantness that no longer resonate in the same way.