Description：After Hao Wanzhong, the public security chief of Jungar Banner, Ordos City, Inner Mongolia, passed away at a young age, Xinhua News Agency reporters followed his life footprints to interview his relatives, colleagues, and work objects, reappearing the image of a public security chief who could not bear to see the people suffer, hated evil, was dedicated to his work, and was full of emotion. Hao Wanzhong (played by Wang Jingchun) left behind 68 work diaries in his 17-year police career. From the first major homicide case he came into contact with as a criminal policeman - an unsolved case that has not yet been solved, to the overall work plan before his death, it records in detail his daily work arrangements, case analysis, life insights, and multiple re-sorting and research on that unsolved case. It is these ordinary bits and pieces that allow us to see the hardships, reluctance and pursuit of a grassroots public security chief; as well as the qualities of a standard policeman.