The wind and shadow are perfunctory
Chinese idiom, Pinyin is f ē n ɡ y ǐ n ɡ f ū y ā n, which means to make accusations, catch shadows and slander people. From the peach blossom fan, Longding.
The origin of Idioms
Kong Shangren's "Peach Blossom Fan · langding" in the Qing Dynasty: "the injustice of flying frost is no more than the injustice of black basin, and each one is perfunctory.".
Idiom usage
As predicate, object, attribute; used in spoken English.
Examples
He is a man who never seeks truth from facts and is used to being perfunctory. Don't believe him.
The wind and shadow are perfunctory
The snipe and the clam fight, and the fisherman gains - yù bàng xiāng zhēng,yú wēng dé lì
great pains taken in working out a scheme - kùn xīn héng lǜ