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What far-reaching influence did the migration of northern minorities have on the ancient economic structure of China?

A large number of people in the north moved to the south, which increased a large number of labor and brought advanced production technologies and tools. Southern rulers attach importance to economic development in order to develop their strength. The introduction of new crops in Jiangnan promoted the development of agricultural production; The development of overseas trade has promoted the prosperity of commodity economy in Jiangnan.