Zhang Tie knew that an aged man who was greedy about sex and tyrannically abused his power would be very afraid of death. As this kind of person would always be used to indulging in various joys, they were very afraid of losing their privileges.
It was very easy to break the mental defense of these kinds of people. As long as you let them know that they were in the palm of your hand and you could stomp them to death like a bug at any time, they would forget their ego completely. Even if you made them lick the soles of your shoes, they would do it better than a dog.
Such a person was essentially a worm, regardless of their position.
Of course, in order to stop him from playing any tricks, Zhang Tie took out a sharp dagger before putting on that loose, ascetic's robe. In this way, that old douche-bag would remember that he might lose his life at any time.