The name of Qin unified currency is Qin Banliang.

before the Qin dynasty, coins in different countries had different shapes, such as shovel coins, knife coins and ring coins, and they could only circulate within their respective jurisdictions. After unifying the six countries, Qin Shihuang decided to unify laws, weights and measures, currency and writing, and abolished the old money of the six countries in the late Warring States period. Based on the improvement of Qin Banliang coins in the Warring States Period, Qin Banliang coins with round square holes were popular all over the country, ending the chaotic state of different shapes and different weights of ancient Chinese currencies.

The appearance of Qin Banliang marks the unification of Qin Shihuang's currency and the initial maturity of ancient coins in China. It is a milestone in the development of China's currency, and it affects neighboring countries and regions, with extraordinary historical significance. Qin Banliang laid the shape of an ancient coin with a round square hole, which became the basic form of money in ancient China, running through China society and used for more than 2, years.

currency modeling

Qin Banliang bronze coins use a round square hole as the currency modeling, with the square hole representing the place and the excircle representing the sky circle. The circular square hole is a symbol of the cosmology of the ancient round place, which is a generally acceptable view. However, some people think that the circular square hole is the need of production and processing, and it is the need of portability, circulation and storage, and it has formed a more scientific system in continuous practice. The semi-pairwise character on the bronze coin is a small seal script, which was inscribed by the famous Li Si of Qin State.

After the reunification of Qin Dynasty, gold was used as the upper currency, and half-taels of round square holes were used as the lower currency. Since then, round square holes have been kept in China for more than 2, years. This form reflects the cosmology of ancient China people, and it is easy to carry and wear. Half-Liang Qian was used in Qin and Han Dynasties. It is characterized by half-Liang in Qin Dynasty, the characters are slightly hidden, and the strokes are square and round, weighing about 4 grams. Qin Banliang, weighing 8 grams, was mostly cast in Qin Shihuang's time.

above content reference: Baidu Encyclopedia-Qin Banliang