Advantages: it is convenient to express emotions. First, it can make "I" quickly enter the role and mobilize feelings into the article; Second, it is easy to express his feelings, and the author naturally becomes the protagonist, which is conducive to the formation of lyrical beauty; Third, it is easy to enhance the authenticity of emotions; Fourth, it can make readers feel intimacy and participation, which can be used as a means to strengthen tone and emphasize feelings.