Wang Jin, the instructor of the 800,000-strong Imperial Army, who appeared earlier in the original novel, did not play an important role in the story. His final destination was only described in the second half of the novel. In the novel, Wang Jin first appeared as a spy sent by the government to Liangshan Lake. With the development of Liangshan Lake, Wang Jin gradually became a member of Liangshan Lake and participated in many battles. Later, the conflict between Liangshan Lake and the imperial court became more and more intense. Wang Jin also participated in many confrontations between Liangshan Lake and the imperial court. After the setback at Liangshan Lake, Wang Jin was also captured by the court and sent to other places to be an official. Although Wang Jin appeared early in the novel, he did not become the main character of the story in the end. His life trajectory was relatively simple.