何必等到长发及腰
[hé bì dĕng dào zhăng fā jí yāo]
This username expresses a sense of nostalgia and melancholy. 'Why wait until my hair reaches my waist' conveys that sometimes we miss out on opportunities and love not because of timing but because of hesitation and indecision. It refers to the regretful feeling of longing for someone when it is too late.