Mytilus, a Chinese first-class word, is pronounced as "bàngbèng" and "bàng": mollusks, which have rectangular and dark brown shells, live in fresh water, and some of them can produce pearls. Bengbu, a place name, is in Anhui Province.

Interpretation of ancient books: Tang _, Ji _, Zheng _, step _ cut, sound stick. _ Wen _. "_ Ya _ _" contains _. Herbal medicine produces rivers, canals and powders. Looking at the moon in the Spring and Autumn History, _ mussels _. "Zuo Si Du _", clam and pearl fetus, _ month _ full. "Picking up _ _" Hanshan Beiquan, there are black clams _ incense _ to go.