Introduction of ancient Huai immigrants

The official migration during Hongwu and Yongle in Ming Dynasty was the third and largest migration in the history of China. Especially in Hongdong, Shanxi Province, the ancient locust tree immigrants are the highest, and the descendants of the ancient locust tree immigrants are all over China. At the end of the Yuan Dynasty, the soldiers were in chaos, floods and droughts caused locusts to become diseases and epidemics, and the people either died or fled. The Central Plains was vast and sparsely populated, and the land was barren. After the establishment of the Ming Dynasty, Zhu Yuanzhang, the founder of the Ming Dynasty, made a strategic decision to emigrate and settle the fields (A Record of Ming Taizu). During the Hongwu period of the Ming Dynasty, a large number of immigrants began, and agricultural production gradually recovered. After Zhu Yuanzhang's death, Wen Jian succeeded to the throne. The four-year "Jingnan War" further aggravated the desolate situation of the Central Plains, and the people either killed or fled, so there was another move of Yongle immigration.