长发及腰不如刘海及腰
[zhăng fā jí yāo bù rú liú hăi jí yāo]
'Hair long enough down to my waist isn’t pretty until it has bangs reaching the waist'. There seems to exist an unexpected contrast, emphasizing that compared with just having very long hair, bangs (hair cut short so it falls across the forehead) down to the waist are better, implying some humorous irony about beauty standards in hairstyle, particularly those regarding women.