The Man in a Condom was a modern Chinese novel that portrayed the protagonist Fang Hongjian's life experience while studying abroad, showing his special identity as a "man in a case" and his inner contradictions and struggles. The author used a variety of expression techniques to create the character image, including: 1. Description: The author gives a detailed description of the protagonist Fang Hongjian's living environment, family background, living habits, social circles, etc., so that the readers can better understand his environment and deeply feel his identity and inner loneliness and depression. 2. Psychological Description: Through the author's in-depth exploration and description of the protagonist Fang Hongjian's inner world, he reveals various contradictions and anxieties during his study abroad, such as his studies, his future, and his longing for his hometown, so that readers can have a deeper understanding of his identity and psychological state. 3. Comparisons: By comparing the lifestyle and mentality of the protagonist Fang Hongjian with other foreign students, the author shows the differences and limitations brought about by his special identity, allowing the readers to more intuitively feel the feeling of being "trapped". 4. Symbolism: The author uses symbolism such as "cover" to symbolize the constraints and restrictions of "the person in the cover" to symbolize the person trapped in social norms to express the identity and inner contradictions of the protagonist Fang Hongjian, allowing the readers to understand his identity and psychological state more deeply. To sum up, the author of The Man in a Condom uses a variety of expression techniques such as narrative description, psychological description, contrast description, symbolic description, etc. to shape the image of the protagonist Fang Hongjian, showing his special identity as a "man in a case" and his inner contradictions and struggles, so that readers can have a deeper understanding of this character's image and social background.