待我长发及腰少年娶我可好纵你青丝成雪小爷非你不娶
[dài wŏ zhăng fā jí yāo shăo nián qŭ wŏ kĕ hăo zòng nĭ qīng sī chéng xuĕ xiăo yé fēi nĭ bù qŭ]
This phrase poetically asks someone to marry her when her hair grows long to her waist; even when he gets old and his hair turns white, she wants him to marry her still. This portrays longing, romantic persistence, and a desire for eternal love.