pacify the good and do away with the cruel
Chinese idiom, Pinyin is "Anli á ngch ú B à o", which means to pacify the kind and eradicate the violent. It comes from Taiping Guangji by Li Fang of Song Dynasty.
The origin of Idioms
Song Li Fang's Taiping Guangji: "the duty of giving up is to get rid of the tyrant and keep the good in peace."
Examples
"Three heroes and five righteousness" in Xuyong chivalrous people, parading villages and cities, contributing to the country. A brief history of Chinese novels by Lu Xun
pacify the good and do away with the cruel
reach the same goal by different means - shū zhì tóng guī