After the reunification of Qin, the currency was "Qin Banliang". Qin Banliang coins with round square holes were popular all over the country, ending the chaotic state of different shapes and weights in ancient China.

"Half two" money is in the outer circle, with no inner and outer contours and a flat back; The character "Banliang" in seal script is listed in the perforations on both sides, and Qian Wen is outstanding, which was created by Li Si, with rigorous layout, square strokes and elegant and rough style. There is a square inside the "half-two" money circle, and the square outside has a circle, which combines rigidity and softness with movement, reaching the highest state of symmetrical and balanced beauty.

During the Warring States and Qin Dynasties, half a tael of money was cast. First it was money, then it was changed to square hole round money. After the reunification of the Qin Dynasty, China was promoted to half a penny. Since then, the currency form of square hole round notes has been used for more than two thousand years. "Historical Records" quoted ancient and modern notes: "Qin Qian is half a Liang, with a diameter of one inch and two cents and a weight of twelve baht.

Qin Shihuang's Way to Unify Currency

First, the state unifies coinage, severely punishes private coinage, and puts the right to make money in the hands of the state. The second is to unify the two currencies, namely, the upper currency gold and the lower currency copper. The change of gold is based on "Iraq", and one Iraq is 22 Liang. Copper coins take "half Liang" as the unit, and the word "half Liang" is obviously cast in gold coins. Copper coins are shaped like square holes, commonly known as "Qin Banliang".

Pearl jade, tortoise shell, silver and tin, which were once popular in six countries, can no longer be used as currency. Speaking of the Qin Dynasty, China's currency was second-class; Gold is named after Yan, and it is a coin; Copper coins, commonly known as half a tael, are as heavy as the text, and are the next coins. Jade beads, tortoiseshell, silver and tin are ornaments, not coins.