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Where did "family 500 years ago" come from?

Was it a family 500 years ago? This allusion began with the migration of Sophora japonica in Hongdong in the early Ming Dynasty. At the beginning of the Ming Dynasty, in order to restore the economy of the vast area of the Central Plains that was deserted by war and famine, the Ming government ordered the centralized immigration under the locust tree in Hongdong, Shanxi. Many people today are descendants of that immigration.