我等着自己白裙落地那天
[wŏ dĕng zhe zì jĭ bái qún luò dì nèi tiān]
The literal meaning is 'I am waiting for that day when my white dress drops to the ground', typically symbolizes the anticipation of a significant occasion, likely her wedding day or coming-of-age ceremony where she imagines herself in white clothes, probably looking elegant and grown-up.