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Hello everyone, my name is Lu Peng. I am a diligent and versatile primary school student. But in some "cases" I passed through the elementary school I attended, I had the idea of becoming a detective. If you don't believe it, let me say this: One day, I saw a little boy during free time at school. He was injured and crying. His head was bleeding and there was still lime on the edges. From this, I can deduce that he was hit with a rock. "I think the boy just now was hit by a stone because there was lime next to his head. The person who hit the little boy with a stone just now is one of Wang Daniu, Zhang San, Ge Chenchen, and Cai Dapang. The reason why I say that is because your hands are all stained with dust, so this may be an accidental injury, or someone may have done it intentionally." I said to the four classmates who had lime on their hands and were still next to the little boy. ............