The purpose was to distinguish between his work and his real identity. The following are some common ones: 1. Use the last word or tone of the name as a pen name. For example, Mo Yan's pen name is "Nobel Prize" and Wang Xiaobo's pen name is "Xiaobo". 2. Use occupation or position as a pen name: For example, Lao She's pen name is Shu Qingchun, and Ba Jin's pen name is Zhou Erfu. 3. Use the place of birth or residence as a pen name: For example, Ding Ling's pen name is "Ling Lin" and Jin Yong's pen name is "Cha Liangyong". 4. Use a pen name for a book or author you like. For example, Margaret Atwood's pen name is Margaret Atwood because she likes One Hundred Years of Solitude. 5. Use fantasy or sci-fi elements as a pen name: For example, Liu Cixin's pen name is "Big Liu" because she likes science fiction. , cultural background, creative style, and other factors. A good pen name could help readers understand and remember the work more easily.