谁的新欢不是别人的旧爱谁的旧爱不是别人的新欢
[shéi de xīn huān bù shì bié rén de jiù ài shéi de jiù ài bù shì bié rén de xīn huān]
'Whose new love isn’t someone else’s old flame? Whose former flame doesn’t become someone else’s cherished one?' It conveys cynicism about the cyclical nature of romance, expressing disillusionment with relationships where affections change hands.