待我长发及腰我就去剪掉
[dài wŏ zhăng fā jí yāo wŏ jiù qù jiăn diào]
'Once my hair reaches waist length, I will cut it.' There is an irony embedded here - possibly signifying that after achieving a goal or waiting period (growing out one's hair), instead of preserving it, they would choose to let it go.