倾城一笑冷眼一瞥
[qīng chéng yī xiào lĕng yăn yī piē]
'A City-Stopping Smile; A Cold Glance' conveys the idea of someone's appearance or action having both extreme attractiveness and aloofness at the same time – their smile can enchant all, while a cold glance shows indifference to the chaos they create.