[詞典] go south by driving the chariot north -- act in a way that defeats one's purpose; be poles apart; go south by driving the chariot northward -- act in direct contravention to; have nothing in common; poles apart;
[例句]後來，人們就把這個故事概括為“南轅北轍”，比喻壹個人的行動和他的目的正好相反。
The idiom derived from this story indicates that one's action was the opposite effect to one's intention.