To write a short essay on literary criticism, we should understand the work and choose the evaluation point. Read the work carefully, have your own understanding of the emotion, image, ideological connotation and artistic characteristics of the work, and grasp the place that makes you feel the deepest so that you can comment. For example, Li Bai's ups and downs of emotional flow and profound and complicated thinking about life in Tianmu Mountain, Du Fu's sadness about life experience and concern for the country in Ascending the Mountain, and Bai Juyi's vivid description of music in Pipa Xing.