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It was eleven o'clock at noon when I saw Gu Qianlin. It was pouring rain outside the police station. Gu Qianlin was sitting in his office of the captain of the Criminal Investigation Team, with Detective Lin Dong standing in front of him. My name is Zhuo Xitong, and I am a writer of detective mystery novels. I met Gu Qianlin during an accidental case, and we became good friends after that. Gu Qianlin often invited me to participate in his detective work. Just last month, I wrote a novel about his detection of a murder case. After receiving the royalties, I made an appointment to treat him to dinner, and the time was scheduled for noon today, so even on the most annoying day of heavy rain, I still came to Gu Qianlin's office on time.