倾国倾城又为谁倾覆天下
[qīng guó qīng chéng yòu wéi shéi qīng fù tiān xià]
This idiom means beauty capable of toppling nations. '倾国倾城' suggests someone with such incredible beauty that it could lead to a country’s downfall. The last part asks rhetorically who can have such power again, expressing a grandiose or dramatic sense.