The theme of the article has practical significance. ② When describing the fisherman's discovery of the Peach Blossom Garden, the author made clear the time and place of the story and the identity and occupation of the fisherman from the beginning: "During the Jin, Thai and Yuan Dynasties, Wu Lingren made a living by fishing." The author writes this way, which makes people feel that everything that happened in the Peach Blossom Garden seems to be true. (3) At the end of the article, it is written that Nanyang Liu Ziji yearns for this paradise. Liu Ziji is a real figure in history, a celebrity in the first year of Jintai, and a contemporary of Tao Yuanming. The author wrote him into his works in order to convince people that Peach Blossom Garden is a real place.