northern North China Platform
northern margin of the North China platform
the part of northern margin of North China platform
Western part of the northern margin of the North China Platform
eastern margin of the North China platform
north margin of North China platform
southern margin of the North China platform
the north margin of North China platform
western margin of the North China Platform
norther mangin of North China platform
the North China Platform
agriculture-pasturage ecotone in Northern China
calcareous soil in Northern China
Cities in northern China
continent of northern China and adjacent areas
desert region in northern China