Forcing me to spoil the story?
All right.
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"Master, I think it's very easy for you to control the demon. Just snap it twice and it's over. It seems like this demon doesn't have much ability. How can it control people?"
The master's brow twitched. This girl, instead of saying that her master is powerful in slaying demons, she says that the demons are weak. Don't be angry, don't be angry.
He calmed down before replying: "This is what demons rely on -" He pointed to his head. "They can sense people's brain waves. As long as they find a little incitable idea in a person's mind, they will take advantage of it and expand that idea infinitely to manipulate mortals."
Ruozhen swallowed: "Master, what is brainwave? Is it delicious?"
The master rewarded Ruozhen with a burst of chestnuts: "You know how to eat! Brain waves are invisible, invisible and intangible, just like the wind."
There were small tears in Ruozhen's eyes, and he flattened his mouth and continued aggrievedly: "Master, if you really understand, people will be controlled by demons only if they have wind in their brains. Tell me carefully, why are you beating people..."