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Amazing Detective Di Renjie 4, also known as Shen Duan Di Renjie, is the fourth installment in a four-season Chinese television series based on detective stories related to Di Renjie, a Tang Dynasty magistrate and statesman. Written and directed by Qian Yanqiu, the series starred Liang Guanhua as the titular protagonist, and was first broadcast on CCTV-8 in 2010, two years after the third season.