Rongchang.

Rongchang District is the westernmost of Chongqing's county-level divisions, called the pearl of western Chongqing, and it borders Sichuan province to the west. County history begins under the Tang, when Changzhou was set up in 758 over a county of Changyuan; the county of Rongchang itself was carved out of Ba County in the Ming. Six subdistricts and fifteen towns cover ground that a 1941 county survey measured at 899.28 square kilometres. Four lines carry the farming economy — pigs, sericulture, hemp and tea — and the list of products includes folding fans, pottery and tea. It is described as the home of the white pig.