Qin Shihuang ordered the abolition of the old coins of the original countries and the implementation of a new monetary system based on Qin coins. Sima Qian recorded in Historical Records: "When it comes to the Qin Dynasty, a country's currency is divided into three classes. In the name of Yi, gold is the currency; Copper coin is known as half a tael, as heavy as its text, and it is the next coin; Pearl jade, tortoise shell, silver and tin belong to ornaments, not coins. " Among them, half of the money shaped like a jade wheel, with a round square hole, has gradually become the mode of making money stipulated by China.

Qin Shihuang not only had clear regulations on the quality, quantity, shape and use of money, but also concentrated the right to coin money and prohibited private casting of money. In fact, Qin Banliang did not surpass the copper coins of pre-Qin countries in casting technology, and his circulation reputation was maintained by national laws. The Golden Cloth Law of Yunmeng Bamboo Slips records: "The person who closes the book will receive a thousand dollars for printing with sincerity, but the money is mixed. ..... The people's market is beautiful and evil with money, and dare not be different. "

As early as the second year of Qin Huiwen's reign, the right to coin casting and distribution was in the hands of the royal family when the currency was first used. Qin money does not cast place names, which is the embodiment of the concentration of coin distribution rights. Qin Shihuang reformed the monetary system. On the one hand, he abolished the old coins of the governors, on the other hand, he prohibited private coinage, and consolidated and strengthened the state's right to coin and issue coins. This is also the most important measure for Qin Shihuang to unify the currency.