During the Sixteen Kingdoms period (304-439), in addition to the You Prefecture in northern Hebei, which was successively controlled by the Later Zhao, Former Yan, Former Qin, Later Zhao and Northern Wei, several other kingdoms in other parts of China also named administrative divisions within their domain "Youzhou". When Liu Yuan ruled the kingdom of Former Zhao, the You Prefecture of Former Zhao was based in present-day Lishi, Shanxi. When Liu Yao ruled the kingdom, the You Prefecture of Later Zhao was moved to present-day Beidi, Yao County, Shaanxi. The You Prefecture of Southern Yan was based in present-day Liaocheng, Shandong, and the You Prefecture of Xia was based in present-day Hanggin Banner of Inner Mongolia. At one time in the 4th century, there were four You Prefectures in northern China, in Northern Yan, Southern Yan, Xia and Northern Wei.