I think it's false
it doesn't share
<span>Population density </span><span>defines the average number of people living within a square mile.
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The main reason for the wall's construction had always been defense. Since China's first dynasty, the empire faced a near-constant threat of attack from the nomadic tribes to the north. This included those famed Mongols as well as lesser-known groups like the Xiongnu and the Göktürks.
