To rack one's brains
As a Chinese idiom, Pinyin is d ā NJ ī NGJ í L ǜ, which means exerting wisdom and energy. It's from reading in Hanlin Academy.
The origin of Idioms
Zhang Juzheng of the Ming Dynasty wrote in the book of reading in the Hanlin Academy: "it's not wise for the sage to do it with all his might to train the emperor."
Analysis of Idioms
A close synonym: to think deeply
Idiom usage
Used as a predicate or object; used for thinking
Chinese PinYin : dān jīng jí lǜ
To rack one's brains
the most uncommon years and months of one 's life. suì yuè zhēng róng
a timely warning may avert a national crisis. yī yán xīng bāng
employ incapable men instead of able men. huáng zhōng cháng qì
more than a match for ten thousand men. wàn fū mò dāng