消逝在黑夜里旳那抹烟火蒸发在空气中旳那句承诺
[xiāo shì zài hēi yè lĭ dì nèi mŏ yān huŏ zhēng fā zài kōng qì zhōng dì nèi jù chéng nuò]
It portrays a poetic way of expressing that promises made may disappear like fleeting fireworks at night or evaporate into thin air. This reflects on the ephemeral nature of some commitments or moments.