Duì nàxiē wángùbùhuà de fànzuì fènzǐ, fǎlǜ bìxū yánchéng.
The law must severely punish incorrigible criminals.
Tips
usage
顽固不化 implies not just stubbornness but resistance to positive change or education. It's stronger than simply 顽固 (stubborn) — the 不化 (won't change/transform) makes it absolute. Often used in political or moral contexts.
