What does the end of the Chinatown Detective Case mean? Plot Analysis Detective Chinatown was a detective novel about Tang Ren, Qin Feng, and Xiao Yang working together to solve a murder case. At the end of the novel, they successfully brought the murderer to justice, but Tang Ren lost his sister. Plot analysis: At the end of the Chinatown Detective Case, Tang Ren and his sister Tang Huizi were killed by the murderer. Tang Huizi was Tang Ren's only relative. She was taken care of by Tang Ren because of her heart disease. However, in the process of solving the murder case, Tang Ren and Qin Feng discovered the true identity of the murderer and decided to avenge Tang Huizi. Qin Feng and Xiao Yang tracked down the murderer's hiding place and successfully arrested the murderer and proved his crime. However, Tang Ren couldn't make up for the loss of his sister. Tang Ren felt very sad, but he still insisted on avenging his sister and trying to find the murderer's crime. In the ending of the novel, Tang Ren and Qin Feng successfully brought the murderer to justice, but they also lost their loved ones, which brought them great pain and sadness. The whole story was full of suspense and reasoning, but it also reflected the complexity of human nature and emotions.