Complex sentence: Bujie semi-castrates him later and forces him to become a monk with the name "Buke Bujie" (不可不戒), which means "cannot have no rules".
Split into simpler sentences: Bujie semi-castrates him later and forces him to become a monk. He is renamed to "Buke Bujie" (不可不戒), which means "cannot have no rules".