Firstly, the research area is divided into three districts according to the physiognomy and the terrain: the northwest low mountainous area, north hilly area and northeast low mountainous area.
首先在空间上依据地形、地貌划分出三个区域：西北部低中山区、北部丘陵区和东北部低中山区。
County surrounded by mountains, the territory of diverse terrain, for the south-central hilly areas in the eastern and northern mountainous deep valley, the mountains to the west basin.
县境四周环山，境内地形多样，中南部为低山丘陵区，东部、北部山多谷深，西部为山间盆地。
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