高句丽在逐步占领玄菟郡的过程中建立了新城。新城是高句丽中后期历史上一座重要的城,它南向防御着中原王朝,西向防御着游牧民族,同时对高句丽北边的诸城也起着屏障作用,这与之前玄菟郡在辽东地区的战略地位是一脉相承的。不过,高句丽将原玄菟郡地区的中心城由平地城转移到了山城。在高句丽的三级城制体制下,新城管辖的城基本上位于原玄菟郡地区。 Koguryo established a new city in the process of gradually occupying Xuanzuo County. The new town is an important city in the history of Kogury 丽 in the late Koguryo. It defended the Central Plains in the south and protected nomads in the west. It also played a barrier role in the cities north of Goguryeo. This was in line with the strategic position of Xuanzhu County in the Liaodong area Is the same strain. However, Goguryeo transferred the central city of the original Xuanzuo-gun region from Pingdi to the mountain town. Under the three-tier system of Goguryeo, the city under the jurisdiction of the New City is basically located in the original Xuanzuo-gun region.