The Romance of the Three Kingdoms was a classic ancient novel, in which loyalty and righteousness were the important theme. Loyalty and righteousness referred to loyalty and justice, which had many manifestations in the novel. In the novel, loyalty was mainly expressed in loyalty to the master. Whether it was Liu Bei, Cao Cao, Sun Quan or Guan Yu, they all showed great loyalty to their masters. They showed unwavering loyalty to their masters and their country. In the novel, justice was mainly expressed in loyalty to the master. When Cao Cao had surrounded Guan Yu, Liu Bei had not betrayed Cao Cao. Instead, he had insisted on saving Guan Yu. Liu Bei also showed his justice for the country. He did not betray the country for personal gain. In the novel, Guan Yu also showed his loyalty and justice to his master. When Cao Cao surrounded Guan Yu, Guan Yu would rather die than surrender and was eventually killed by Cao Cao. Although Guan Yu finally got what he deserved, his loyalty and justice were still praised by people. In short, loyalty and justice were important aspects of loyalty and righteousness in the novel, and these performances also reflected the pursuit of loyalty and justice by ancient people.