待我长发及腰我必送你剪刀
[dài wŏ zhăng fā jí yāo wŏ bì sòng nĭ jiăn dāo]
When My Hair Reaches My Waist, I’ll Surely Give You Scissors - An ironical promise made between two people. When a girl grows her hair long expecting maturity/love, giving scissors means ending it, which is somewhat a cruel and heart-breaking statement.