倾国倾城不倾她心
[qīng guó qīng chéng bù qīng tā xīn]
'Charming enough to topple a country, beautiful enough to captivate a city, but not to touch her heart' is a romantic expression, depicting an extreme beauty of one who cannot be touched emotionally. It illustrates someone with captivating charm and allure yet emotionally unavailable or unresponsive.