When and why did the people who moved from Yunnan to Jimo move away?

Most of them moved here in the early Ming Dynasty. In the early Ming Dynasty, Zhu Yuanzhang's army swept across the north and recovered the rivers and mountains. The population in the north is very small because of the war that lasted 100 years. In order to defend the territory, Zhu Yuanzhang set up health clinics in various places, and many people came with the army in this way. A small number of them are immigrants.