烟花下挥不掉的曾经烟花下抹不掉的回忆
[yān huā xià huī bù diào de céng jīng yān huā xià mŏ bù diào de huí yì]
The title speaks to unchanging memories under fireworks – suggesting lasting moments experienced under a sky of firework displays are unforgettable, either due to beauty or because they carry personal significance.