During the Daguan period of the Northern Song Dynasty, the currency was Daguan Tongbao copper coins

Daguan Tongbao "is a year name coin minted by Emperor Huizong Zhao Ji of the Northern Song Dynasty during the Daguan period (1107-1110 AD). It has various formats such as Xiaoping, Fold 2, Fold 3, Fold 10, etc. The currency of the Northern Song Dynasty, Daguan Tongbao, was inscribed with inscriptions by Emperor Huizong. The Song Dynasty was different from previous dynasties in that new coins were minted with each new year name. If the year name was the same as the Baowen, non year name coins were minted even more. In the third hundred years of the Song Dynasty, the main currency used was the small flat folded two coins, during which there were also large coins circulating and the outline and size of the coins had certain standards. Rare throughout history, in addition to the authentic, cursive, clerical, and seal scripts, Qian Wen also features the thin gold body of Emperor Huizong of the Northern Song Dynasty, known as the "Jade Carving Silver Hook".