Zhang Fan was young and just a resident doctor. He didn't need to mind his status like how Superintendent Ouyang and the directors would. Not only that, Zhang Fan really did have the ability to perform this surgery.
Professor Chang wasn't able to win a war of words against Zhang Fan, so he started trying to scare Zhang Fan instead. "Young man, don't make it so that you're unable to stay in the medical field just for the sake of getting into your leaders' good graces."
