capitol city of the gin dynasty was Kaifeng which was captured by the yuan army (1224). Caizhou another important city, was also captured by the yuan army (1234 A. D).
The most important city was Qin City, which became known as the state of Qin. The major cities/states of prominence were Yan, Qi, Wei, Zhao, Han and Chu.
May be the Qin dynasty? The Qin capital was Xiangyang. Other important cities (commandery seats) include Hanzhong, Handon, Dong, Dang, Henei, Liaodong, Liaoxi, Shanggu, Yuyang, Jiuyuan, Taiyuan, Hengshan and Qianzhong.