Qīxiàn
Qi County was the seat county of Tongchuan in the northern Sichuan Basin. It took its name from the Qi River, although the older Han county of the name had its seat farther south. The later county served as the seat of Zizhou under the Tang and of Tongchuan Prefecture under the Yuan. In 1376 the Ming reduced the prefecture to Tongchuan Zhou and incorporated its seat county into the Zhou. The name of Qi survived in the river and in the historical geography of the district.