When did Wu Yuan and Zhao immigrate from Suzhou to Hai 'an?

In the early Ming Dynasty, the population of the south of the Yangtze River migrated to the north of Jiangsu, also known as "red scarf drive away" and "red fly drive away", which occurred in the early Ming Dynasty. At that time, the court moved a large number of people from Jiangnan to northern Jiangsu for reclamation, which was called "Hongwu drive away" in history. Because Zhu Yuanzhang's troops wore red scarves, they were called "Red Scarf Army" and "Hongwu drove them away". "Red flies drive away" is a myth of "red scarf drive away", which may be due to dissatisfaction with the red scarf army and likened to the plague of red flies. "Drive away" is also called "drive away Korea".