an army for a punitive purpose
The Chinese idiom, w è nzu ì zh ī sh ī, refers to the person who comes to ask severe questions. It comes from the collection of Fan Chuan's poems, the collection of essays written by Yin Qianzhi of he Yeren.
Idiom usage
A person who comes to ask for a crime
Examples
The sun has turned to the sun, and there is no one to blame. Pu Songling's Liao Zhai Zhi Yi Ge Jin in Qing Dynasty
The origin of Idioms
Du Mu's Anthology of Fan Chuan's poems, the collection of essays by Yin Qianzhi, a savage, in the Tang Dynasty, said: "be generous and gentle, and ask the guilty master calmly."
an army for a punitive purpose
Fish letters and wild geese letters - yú shū yàn xìn