Knife money is the name of large, cast, bronze, knife-shaped commodity money produced by various governments and kingdoms in what is now China, approximately 2500 years ago. Knife money circulated in China between 600 and 200 B.C. during the Zhou dynasty.

Spade money was an early form of coin and commodity money used during the Zhou dynasty of China. Spade money was shaped like a spade or weeding tool, but the thin blade and small sizes of spade money indicate that it had no utilitarian function. The earlier versions of spade coins tended to have a fragile, hollow socket, reminiscent of a metal shovel. Later versions of spade money had this socket transformed into a thin, flat piece, and over time, inscriptions were added to the spade coins to mark their denominations. Several versions of spade money circulated across the Chinese Central Plains during the Zhou dynasty period until they were abolished by the Qin dynasty in 221 BC in favour of the Ban Liang cash coins.