素面朝天 [ sù miàn cháo tiān ]
基本释义
不施脂粉而朝见皇帝。
英文翻译
fig. (of a woman) to show one's natural features, without makeup; to present oneself just as one is, without artifice; lit. to present oneself confidently to the emperor, without makeup (as did the sister of Yang Guifei 杨贵妃) (idiom)