There were many reasons why Shen Shixi's novel had a bad ending. Shen Shixi's novels usually took animals as the main characters, and there were often complicated interpersonal relationships and interests in the animal world. In the novel, there might be fights between animals, betrayal and deception. These factors might lead to conflicts and contradictions between animals and eventually lead to a bad ending. Shen Shixi's novels might explore some social reality problems such as the gap between the rich and the poor, class opposition, political corruption, etc. These problems might affect the lives of the animals and lead to a bad ending. Shen Shixi's novels might show some cruel natural environment and ecological balance problems. For example, the novel might describe the loneliness, helplessness, and struggle of animals in the natural environment, or the scenes of animals being captured, killed, and sold by humans. These plots might lead to bad endings for animals. To sum up, the reasons for the bad ending of Shen Shixi's novel were due to the plot, the setting of animal characters, social reality, and the ecological balance of the natural environment.