待你长发及腰削发为尼可好
[dài nĭ zhăng fā jí yāo xuē fā wéi ní kĕ hăo]
Means 'When your hair grows to your waist, shall we shave it off to become a nun?' This expresses a contemplation on transformation, commitment, or sacrifice, possibly alluding to renouncing the world.