Deterrence.

Shi Lang was standing inside the Inner Court of the Martial Spirit Hall. He was facing Du Tian with a calm expression on his face despite throwing out the life and death battle match threat. 

The latter, however, did not look too good. His face was pale when he looked into Shi Lang's indifferent eyes. A voice sounded in his mind, 'Pig Du, this guy dares to fight the elder of the Situ family. Are you crazy to get entangled with him as soon as he arrives here? Have your brain turned to mush, you swine!'

Du Tian woke up, and looking at the new comer he realized what he had just done. He smiled and said, "Junior Brother Shi Lang, you are misunderstanding my joke. How can I disgrace His Excellency, the Great Elder. Please forgive me."