Zheng Zhongkui has left no clear record of his life, native place, or dates of birth and death, and public information about him is limited. Existing catalog data show that a single work, Er Xin, is attributed to him and is classified among classic works. Judging from its title and usual categorization, Er Xin appears to be a collection of notes and miscellaneous records, dealing largely with anecdotes, hearsay, and incidental observations. Its style is concise and essayistic, in the manner of casual jottings kept by a traditional man of letters. Works of this kind were often undervalued beside formal literary collections, yet they preserve fragments of social custom and everyday observation that can be of some reference value for understanding what people of the time noticed and how they told it. Because other biographical materials on Zheng Zhongkui are lacking, his associates, teachers, and full body of writings cannot be reliably established; readers and researchers can gain only a partial view of his writing and choice of material through Er Xin, and further details await the discovery and collation of new sources.
