insist on doing evil without repentance
Chinese idiom, Pinyin is w é I è B ù Qu ā n, meaning to persist in doing evil and refuse to repent. From Soushenji.
The origin of Idioms
The seventh volume of "Soushenji" written by Gan Bao of Jin Dynasty: "empress Jia is not evil."
Idiom usage
I'm not going to repent. This man will be punished by the law after all. Wei Shu Volume 54 biography of Gao Lu: squirming descendants attack their evil deeds, frequently harass by bandits, and do no evil.
insist on doing evil without repentance
The Dragon twists and the snake stretches - lóng qū shé shēn
When a viper stings his hand, a strong man will get rid of it - fù shé shì shǒu,zhuàng shì jiě wàn