Duan Yucai (段玉裁; courtesy name: Ruoying 若膺) (1735-1815) was a Chinese philologist of the Qing Dynasty, most famous for his annotated edition of "Shuowen Jiezi".
Duan Yucai (段玉裁; courtesy name: Ruoying 若膺) (1735-1815) was a Chinese philologist of the Qing Dynasty. He made great contributions to the study of Historical Chinese phonology, and is known for his annotated edition of "Shuowen Jiezi".