[láng zǐ yě xīn]
be a wolf with a savage heart; an ambitious wolf cub; a person greedy and cruel and full of wild ambitions; a wicked monster; diabolical ambitions; savage like a wolf in disposition; the ambition of a wolf cub; the reprobate's ambition; wild ambition; wolfish ambition [designs]; wolfish nature
His wild ambition was thoroughly exposed.
他的狼子野心暴露无遗。