Counties under the jurisdiction of Youzhou in the Eastern Han Dynasty: Dai Jun: the western part of Youzhou, where Daixian is located (so it is located in the southwest of Yuxian County, Hebei Province): Shanggu County in the northwest of Zhangjiakou City, Hebei Province, which was named after it was built on the top of a big valley. Zhuo Jun: Southwest of Youzhou, now Zhuozhou area. Yangguang county: the central part of Beijing today. Yuyang County: Central: The old city is in Huairou County, Beijing today. Right Beiping County: Zhongping, Pinggang, now Pingquan County, Hebei Province. Liaoxi County: the central and eastern part, where Longcheng (now Chaoyang) is located. Xuantu County: Northeast China, which governs today's Shenyang and Fushun. Liaodong County: In the east, that is, in the area of Liaodong Peninsula today. Lelang County: In the east, it is located in North Korea County (now the south bank of Datong River in Pyongyang) and governs the northern part of the Korean Peninsula. Daifang County is a military, political and economic local stronghold established by the Central Plains Dynasty in the central and western parts of the Korean Peninsula during the hundred years from 2004 to 3 13. Jurisdiction over several counties separated from the south of Le Lang County.