The Ruzhen people controlled the North of China after defeating the Liao dynasty. The Jin emperor Tai Zong occupied the northern part of China, and the Song had to move their capital from Kaifeng to Hangzhou in the South in 1127.
Coins minted during the Jin period were of a very high quality: the calligraphy was exquisite, and the casting was finely done. The Jin cast coins with four reign titles: Huang Tong, Zheng Yuan, Da Ding and Tai He. Only one Huang Tong is known to exist today. The Tai He Zhong Bao were cast with a very special and particularly beautiful calligraphic style called jade tendon seal script (see calligraphy) (Ren p. 91).