Language is used for message conveyance, thought communication, and the expression of feeling. For Chinese-speaking people to fully express themselves, they need an abundant vocabulary. The most used words in their daily conversation are descriptive, especially those words in peculiar forms such as reduplicates. Reduplicates usually give effective vividness. In view of this, Yuen Ren Chao in his A Grammar of Spoken Chinese termed the reduplicated adjectives, vivid reduplicates. 'Meng Lang Shi's Dieya, written in the Qing Dynasty, is the first book aimed at making a systematic analysis of Chinese reduplicates. It opens the gateway to the old Chinese reduplicates and takes priority in studies thereof. Natrually, it becomes the topic of choice in the current study. The so-called 'reduplicate' in the old days was a vague title. In fact, there are two types of reduplicates: one is formed by reduplicating two monosyllabic morphemes, which takes on the same meaning as its constituted morphemes; the other, though consisting of two characters, is a bisyllabic compound morpheme. The two are similar in form but differ in their grammatical sense. The study aims to distinguish the types of reduplicates by further exploring the characteristics of Chinese word reduplication. The knowledge of the characteristics of word reduplication is necessary in understanding and commenting on the ancient Chinese works. In the study, modern linguistic theory is applied to the analysis and sorting of reduplicates. Both their grammatical and semantic aspects are focused upon. The article consists of twenty thousand words, including the following three sections: 1. Introduction: a brief biography of Meng Lan Shi and his works, and the motivation and purpose of the present study; 2. Main Body: a discussion of the content, form, and commentary of Dieya; 3. Conclusion: an exposition of the characteristics of word reduplication.