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
To strike a duck and startle a mandarin duck - dǎ yā jīng yuān
as easily as walking on firm earth - rú lǚ píng dì