Significance difference: Meibei is a clam, a tongue of Xi Shi, alias Cheji and Eupolyphaga sinensis, belonging to Cladocera. Shaji has a dish called Xishi Tongue, which is made of a kind of marine shell called Shaji. The flower shell is a mollusk of the genus Paphia, a cladocera. Also known as snail, clam and oil clam.

Shell difference: Meibei thick triangular fan, yellow-brown shell, smooth surface, a little purple at the top; The surface of the flower carapace is yellowish brown, with fine growth line. It can be seen that brown lines are interwoven into a rhombic grid.