Identification method: put the copper coin straight, with "Shun" on the top, "Governance" on the bottom, "Bao" on the left and "Tong" on the right, then the "Shun" has the prefix above, and the "Governance" has the foot below, leaving the left and right wings.
The back of the copper coin used to be the front, because the signature on the back was written in Manchu and the name of the emperor was on the front. Because this copper coin was initiated and circulated in the Central Plains, everyone used Chinese characters as the front (literal) of the copper coin, and the Manchu symbol on the back was only used to record the bureau name.
Ancient copper coins
Copper coin, ancient copper coin, refers to all kinds of square hole coins after Qin and Han dynasties, and the casting period of square hole coins continued until the late Qing Dynasty and the early Republic of China.
During the Spring and Autumn Period and the Warring States Period, with the development of commodity economy, the metal weighing currency that needs to be divided and identified in circulation gradually became unsuitable and was replaced by metal coins. Most ancient coins in China were cast in the form of copper alloy, and square hole coins (copper coins) were the most common ancient coins.