China is extremely rich in oyster species diversity. Shell morphology, the main character used in oyster classification, is known to be plastic and subject to environmental variation, this leads to many con-fusions and disagreements about oyster classification by different experts, especially for "zhe" oysters from North China. In this paper, we summarize the taxonomic history of "zhe" oyster, we report the new find-ings about the classification of "zhe" oysters in our study. It will clarify the taxonomic status of confused "zhe" oysters from North China. It will contribute to the oyster fishery, as well as to the management and protection of oyster resources in China.