rack one's brains
Racking one's brains is a Chinese idiom, pronounced Ji ǎ OJ ì NN ǎ ozh ī, which means to think hard, to think hard, to think hard, to think hard. It's from Lao She's "four generations in the same room: stealing life.".
The origin of Idioms
Lao She's "four generations in the same room: stealing life" 37: "only in this way can he show the appearance of racking his brains and think for him."
Idiom usage
The verb object type is used as predicate, attribute, object and adverbial. He racked his brains to come up with a solution to the problem.
rack one's brains
a settled practice is hard to reform - jī xí nán gǎi
give the rulers less while give the civilians more - sǔn shàng yì xià
do evil against one's conscience - mèi jǐ mán xīn
There is no division between the two - xuān zhì bù fēn