What kind of currency did people use before Qin Shi Huang unified the currency?

Qin half-tael: currency issued after the unification of Qin.

Before the unification of the six states by Qin, the shapes of the coins of various countries were different, such as shovel coins, knife coins, ring money, etc., and they could only be circulated within their respective jurisdictions; after the unification of the six states by the First Emperor of Qin, he determined to unify the laws, weights, measures, currencies, and characters, abolished the old money of the six states in the late Warring States period, and improved on the basis of the Qin half-royal of the Warring States period, so that the round, square-hole Qin half-royal of the whole country prevailed, thus ending the messy state of our country's ancient The money of different shapes and weights of the cluttered state of China's ancient.

Answer time: 2021-12-21, the latest business changes, please refer to the Ping An Bank official website announcement shall prevail.