640000 km² plateau around the Wei River valley and the southern half of the Ordos Loop of the Yellow River in central China, covering almost all of Shaanxi and Shanxi and parts of Gansu, Ningxia, and Inner Mongolia
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640000 km² plateau around the Wei River valley and the southern half of the Ordos Loop of the Yellow River in central China, covering almost all of Shaanxi and Shanxi and parts of Gansu, Ningxia, and Inner Mongolia