feign madness and act like an idiot
Chinese idiom, Pinyin is Zhu ā NGF ē NGM à ISH ǎ, which means deliberately pretending to be crazy. From three notes.
The origin of Idioms
Wang Yuanjian's three notes: "that's the world of the white devils of the Kuomintang. I'll give him a fool and ask him three questions."
Idiom usage
It has a derogatory meaning. In Cheng Daoyi's Romance of the gengzi incident, "I intend to pretend to be crazy and fool, act as an immortal, kill this dragon, and then I can ascend the throne."
feign madness and act like an idiot
similarly afflicted people pity each other - tóng bìng xiāng lián
settle a given question on a single authority - dìng yú yī zūn
know and observe all but stay obscure - zhī bái shǒu hēi