Duan Yu-cai's view on binome, as shown in his work Shuo Wen Jie Zi Zhu, focuses on how binome is used to build words in Chinese. Binome is seen as a combination of two characters that can be alliterative, rhyming, or onomatopoeic. Over time, the form of binome has changed in the history of language. Binome cannot be interpreted separately or formally. Duan Yu-cai's perspective on binome forms a valuable theoretical system for studying ancient Chinese language.