"Zheng-Zi-Tong" was written by Zi-Lie Zheng in late Ming and early Qing Dynasty to correct the mistakes of "Vocabulary". Even though its content was based on "Vocabulary", it was added with many new vocabularies and examples. With the differences from "Vocabulary" in induction of meanings, use of examples, explanation of words, and editing, it has an unique style of explanation. This essay observed the merits and demerits of "Zheng-Zi-Tong" through the analysis of its characteristic features, in order to show its position and value in the development of dictionary.