In what year did Sophora japonica migrate to Hong Tong?

The migration of Sophora japonica was the third year of Hongwu in Ming Dynasty, that is, 1730.

The Ming government went through the formalities from Pingyang, Luzhou, Zezhou and Fenzhou in Shanxi, passed through the big pagoda tree in Hongdong County, Shanxi Province, and then immigrated to vast areas of the country.

At the beginning of the Ming Dynasty, millions of immigrants moved to all parts of the country through locust trees in Hongtong County. Its time, scale and influence are unprecedented not only in the history of China, but also rare in the history of world immigration. This had a wide and far-reaching impact on the Ming Dynasty at that time and the subsequent social development.