For example, the case of Phantom of the Grass Canal in the play is about the collusion between princes, officials and bullies, which has caused salt panic and people's livelihood in Huaibei area for more than a year. Officials sent by the imperial court investigated the matter, but there was no result. Li Han, an honest and clean doctor from the Ministry of Water Resources, was killed in the investigation and committed suicide by falsely accusing him of taking bribes. Just when Di Renjie was appointed to investigate the case, there was an incident of murdering the petition tracker in Luoyang, the capital of the gods. He realized that it had something to do with the case of the Hangou River capsizing. In his words, "there are few real coincidences in the world, and things that often seem to be coincidences are inevitably related." Di Renjie took this as an incision, peeled off the skin layer by layer, found out the truth, and executed corrupt officials who committed capital crimes on the spot.
Dee Renjie is a legendary detective drama, which is different from the real story. We can move with the rhythm and relax, and we can also query bugs and ask questions. Moreover, Di Renjie's rigorous observation, systematic analysis and rigorous reasoning in the process of solving crimes are also of great reference value to those who pay attention to and engage in the legal profession.