keep secret
It's a Chinese idiom. Pinyin is m ì é RB ù y á n, which means to keep a secret. It's from "Soushenji" by Gan Bao of Jin Dynasty.
The origin of Idioms
The seventh volume of "Soushenji" written by Gan Bao of Jin Dynasty: "Chengyi is worried and afraid, but he doesn't say anything."
Idiom usage
To keep a secret of something.
keep secret
be like the three legs of a tripod - sān fēn dǐng zú
dissipated young sets who take a fancy to lewdness - yóu fēng xì dié