素面朝天

sù miàn cháo tiānsumianchaotian

1. lit. to present oneself confidently to the emperor, without makeup (as did the sister of Yang Guifei 楊貴妃|杨贵妃[Yang2 Gui4 fei1]) (idiom)
2. fig. (of a woman) to show one's natural features, without makeup
3. to present oneself just as one is, without artifice

Study it in Yanamino