"Chi Mu, Chi Mu, how do you solve this question?"
Chi Mu turned around and looked at the young man's smiling face. His heart moved and he glanced at the question again. He turned back indifferently and said, "Turn over the book."
Dong Nunu mouthed in deep disappointment, "But I don't know which book to read."
Listening to the boy's childish voice, Chi Mu unconsciously raised his lips and said slowly, "Physics Compulsory Course 2, page 10."
Intention: As long as the thinking does not slip, there are always more methods than difficulties
