你说的承诺早已泛黄
[nĭ shuō de chéng nuò zăo yĭ fàn huáng]
This translates to 'The promises you made have yellowed'. 'Yellowed' refers to old, aged paper turning yellow due to time passing by. It indicates that past promises made have become ancient and outdated, like yellowed letters nobody has kept track of over time; essentially suggesting forgotten or unfulfilled commitments.