The eighth episode. In the eighth episode of "Yanzhao Interpol", the pursuit of a thousand miles (up and down) is based on a series of murder documentaries in Zhangjiakou. Carpenter Yuan Zhangping lost his documents and suffered humiliation and injustice. Li Jindong, a ferocious robber, committed a crazy crime under disguise. Yanzhao Interpol is a 30-episode police drama directed by Yi and starring Zhang Hua and others. One of the characteristics of Yanzhao Interpol is that most of the policemen in the play are personally played by the policemen involved in solving the case, with Hebei Province 15 as the background.