Tong Bei () literally translated as "bronze cowry" or "bronze shell", is an ancient

coin A coin is a small object, usually round and flat, used primarily as a medium of exchange or legal tender. They are standardized in weight, and produced in large quantities at a mint in order to facilitate trade. They are most often issued by ...

found in China. This coin itself is a replica of more ancient cowry money, made for the purpose of replacing it. A cowry shell or bronze cowry was denominated in ''bèi'' (貝) and string of cowry shells was called a ''péng'' (朋) however it is not known how many ''bèi'' were in a ''péng''.Chinesecoins.lyq.dk (ancient Chinese coinage)
weights and units in Chinese coinage
by Lars Bo Christensen. Retrieved: 13 August 2018.

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{{Chinese currency and coinage Shang dynasty Coins of ancient China Bronze coins