微微一笑很倾城酷酷一站很帅毙
[wēi wēi yī xiào hĕn qīng chéng kù kù yī zhàn hĕn shuài bì]
Derived from a popular novel turned drama. It generally means 'A little smile is very charming; standing there calmly appears extremely cool and impressive,' implying attractiveness and poise with just a simple smile or stance.