detective Huo Sang. Detective Hu visited four addresses one after another. Each time, he mistakenly thought he had found Huo Sang. But in fact, these people were a lawyer, a student, and an actor respectively. Finally, he found that the so-called Huo Sang was actually the writer Cheng Xiaoqing. Qin Kanxin admitted that this was just a joke. Huo Sang is a character in a novel, and the addresses were made up randomly. Detective Hu felt both embarrassed and helpless.