In 314 BC, Juren County (朐忍县) was established in Qin state. In 568 AD, the county seat was moved to the site of modern Yunyang Town, and the county was renamed Yun'an (云安县).
In 314 BC, Juren County (朐忍县) emerged within the framework of Qin state. Subsequently, in 568 AD, the administrative hub of the county was repositioned to its current site, which is now modern-day Yunyang Town, and it was subsequently redesignated as Yun'an County.