Han Feizi tells a guard ate the immortality elixir. He used logic to argue innocence and expose fraud, saving his life.
by Han Fei King Xuan of Qi required three hundred musicians to play the yu (a traditional Chinese wind instrument) for him at the same time.
A charlatan informed the King of Yan that he could make him immortal, and the prince bade one of his subjects learn this art; but before the envoy could do so the stranger died. Then the prince, in great anger, executed his subject.