The description of the character's mood and the environment was one of the common techniques in novel writing. The following is an example of a paragraph describing the mood of a character through the environment: He sat by the window and looked at the people and cars on the street. His mood became irritable and uneasy. He thought of some unpleasant things that had happened recently and felt that the whole world had become gray. As night fell, the streets became quiet. Only the occasional sound of cars could be heard. His mood also calmed down. He felt as if he had been saved by a wonderful power, as if the irritability and uneasiness in his heart had been washed away. In this quiet night, he felt an unprecedented calmness and tranquility. He realized that the environment could affect people's emotions, and emotions could also affect the environment. By describing the environment, the author could let the readers better understand the mood of the characters and also enhance the description of the situation in the novel.