Aspects of this topic are discussed in the following places at Britannica.
...Soils are of the brown forest and cinnamon types. The ranges rise steeply from the North China Plain to an elevation of approximately 3,300 to 4,000 feet (1,000 to 1,200 metres) above sea level; Mount Xiaowutai, in northwestern Hebei province, reaches 9,455 feet (2,882 metres). A spur of the Great Wall extends north-south along the eastern foothills. In the south, in the northwestern part of...
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