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The police team continued to pursue Wu Wenchao's whereabouts, and found his traces in the unfinished building but still did not catch him. The police found that Wu Wenchao's mobile phone signal appeared in Zhinan City, the Sino-Vietnam border. In fact, Wu Wenchao sent his mobile phone to his local classmate Fang Ziming . After reasoning, the police believed that Wu Wenchao should be returning to his hometown, so they were preparing to go to Xinglong County to investigate. During the investigation, Shao Tianwei told Ran Dongdong that Mudafu had asked him for something. Ran Dongdong also said that he had not cut his wrists, because Mudafu had hallucinations.