素面朝天

1. • lit. to present oneself confidently to the emperor, without makeup (as did the sister of Yang Guifei 杨贵妃 yángguìfēi) (idiom)
2. • fig. (of a woman) to show one's natural features, without makeup
3. • to present oneself just as one is, without artifice

Character by character

• 素(sù)raw silk
• 面(miàn)face
• 朝(cháo)imperial or royal court
• 天(tiān)day