mysterious and hard to guess
Chinese idiom, Pinyin is Gu ǐ m ì M C è, which means that people's behavior and attitude are mysterious and difficult to guess. It comes from the complete works of Houcun, one of the reading papers of Heshi.
Idiom explanation
Mysteries: mysterious and unknowable; unfathomable: unpredictable.
The origin of Idioms
Liu Kezhuang, Song Dynasty, wrote the complete works of Houcun, one of Heshi's reading of Diebao: "the ghost Valley is full of tongue, and Zhongnan is secretive."
Idiom usage
It has a derogatory meaning.
mysterious and hard to guess
as a little bird rests upon a man -- a timid and lovable little woman - fēi niǎo yī rén