Starting with Song Yan Tong Bao, which was minted around the founding days, every time they changed the name of an era, they minted new coins with its name, which resulted in the variations of copper coins such as Tai Ping Tong Bao, Chun Hua Tong Bao, Zhi Dao Yuan Bao, Xian Ping Yuan Bao, Jing De Yuan Bao and Xiang Fu Yuan Bao.
建国当初の宋通元宝にはじまり、歴代の改元のたびに、その年号をつけた新銭を鋳造したため、太平通宝・淳化元宝・至道元宝・咸平元宝・景徳元宝・祥符元宝といった銅銭が見られる。