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You Chuangxin lives in Yelanggou. She has to climb a huge mountain to go to middle school in the town. Even with her long legs, she has to walk for more than ten hours. Most people don't dare to climb the mountain in winter because there is no sunlight on both sides and they are afraid of encountering wolves. The daytime is always three or four hours longer in summer than in winter, so the danger is not great.