Guess: How many people are bored?

Teacher: Students, let me tell you a story. Li Bai was very playful when he was young. One day, he went out to play and met an old woman grinding iron bars by the river. Li Bai went up and asked, Grandma, why did you grind this iron bar so thick? At this time, what should the old woman say to make Li Bai feel? Students should answer.

Xiaohong: Be patient. When you start something, you should stick to it. You can't give up halfway.

Teacher: Well, very good, Xiao Ming. Name one.

Xiaoming: I want to stab Wei Zi, that little bitch.