There is more than one county in Yanjin, or there are several districts in Yanjin County. Yanjing County is located in Yanjing Town, but the county government is not located in Yanjing Town. Yanjing Town is the old county seat of Yanjin County, located in the narrow slopes and cliffs on both sides of Guanhe River. Due to the limitation of canyon topography, the county seat is very small, so there is a long and narrow scene, and the built-up area is about 1 square kilometer.