Answer:
In ancient China, the so-called "Central Plains" and "Guanzhong" referred in a narrow sense to the area around Henan, including parts of southern Hebei, southern Shanxi and western Shandong. In a broader sense, it refers to a large area along the middle and lower reaches of the Yellow River, including present-day Henan, the Guanzhong area of Shaanxi, Shanxi and southern Hebei, western Shandong, northwestern Jiangsu, Anhui and parts of northern Hubei.
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