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. History There are several stories that attempt to explain how knife money was introduced but it is not certain if any or all are true. In one of the stories, a prince who was running low on money to pay his troops allowed them to use their knives as a form of currency to barter with villagers, and the medium became so popular that it became generally accepted. In another story, the same prince began accepting knives as payment for small fines in the place of the current legal ring money. Knife money may also have been brought in by sea traders from the Indian Ocean. Classification Knife Money is much the same shape as the actual knives in use during the Zhou period. They appear to have evolved in parallel with the Spade money in the north-east of China. Qi knives: These large knives are attributed to the State of Qi, and are found in the Shandong area. They do not appear to have circulated much outside of this area. Although there has been considerable controversy concerning the date of their issue, archaeology shows them to be products of the Warring States period. They are known as Three Character Knives, Four Character Knives and so on, according to the number of characters in their inscriptions. Some consider the three horizontal lines and the mark below on some reverses are part of the inscription. The inscription refers to the establishment of the State of Qi. This could have been in 1122 BC, 894 BC, 685 BC, or 386 BC, depending on how one interprets the early histories. The two later dates are the most likely for the introduction of these coins. The alloy of the Three Character Knives contains around 54% copper, 38% lead, and 8% tin. The Four and Five Character Knives contain about 70% copper. Needle tip knives: This type of knife money is distinguished by their long pointed tip. They were unknown until 1932, when a hoard was unearthed at Chengde in Hebei province; later hoards have also been found in this area. It has been suggested that such knives were produced for the trade between