In the first year of Tang Dynasty (758), the court approved the establishment of Changzhou, which belonged to Luzhou, Zhou Pu, Yuzhou, Hezhou, Rongzhou and Zizhou. At the same time, it is divided into three counties: Changyuan, Dazu and Jingnan. The establishment of Changyuan County is the beginning of the formal establishment of Rongchang County.
During the Five Dynasties, Changyuan County was ruled by pre-Shu, post-Tang and post-Shu successively. In the seventeenth year of Zheng Guang in the post-Shu Dynasty, that is, in the first year of Xiande in the post-Zhou Dynasty (954), Changyuan County was burned by mutinous soldiers. ?
Historical evolution:
Rongchang has a long history. About 20,000 years ago, there were primitive people in Rongchang. During the Warring States period, the territory belonged to Pakistan. After the Qin dynasty destroyed Ba, the county system was implemented, belonging to Ba County.
Qianwei County was newly established after the early Han Dynasty, and it is the territory of Jiangyang County, Zizhong County and Zhongdianjiang County in Ba County. In the fifth year of Emperor Wu of the Han Dynasty (before 106), he was transferred to Yizhou. After the Eastern Han Dynasty, the Three Kingdoms, the Jin Dynasty, the Southern and Northern Dynasties to the Sui Dynasty and the early Tang Dynasty, the territory was basically Jiangyang (later renamed Luchuan County) and Han 'an (later renamed Neijiang County). ?