丰宁县,全称丰宁满族自治县,位于河北省北部的承德市,南临北京,北接内蒙,人口38万。县境内重峦叠嶂,整个地势由西北向东南倾斜,形成坝上和坝下两个自然区域,低山与丘陵占到县境总面积的80%以上。①丰宁的历史是北方少数民族和中原汉族交流融合的历史。战国时,燕始置渔阳郡,丰宁 Fengning County, the full name of Fengning Manchu Autonomous County, located in northern Hebei Chengde City, south of Beijing, north of Inner Mongolia, a population of 380,000. Counties within the mountains, the entire topography from northwest to southeast tilt, the formation of the dam and the dam two natural areas, low mountains and hills account for more than 80% of the total area of ​​the county. ① The history of Fengning is the history of exchanges and integration between the northern minorities and the Han Chinese in the Central Plains. Warring States, Yan began to set Yuyang County, Fengning