Which nation has six toenails?

At the end of the Yuan Dynasty and the beginning of the Ming Dynasty, the perennial war caused heavy losses, the land was abandoned and the population dropped sharply. Shanxi, on the other hand, prospered because it was far away from the war, and its population reached its peak. Therefore, during Zhu Yuanzhang's reign, * * * carried out three large-scale population migrations, and moved Shanxi people to Henan, Hebei, Shandong, Anhui and other provinces. Therefore, there is a folk proverb "Ask me where my hometown is, the locust tree in Hongdong, Shanxi", which reflects the history of large-scale population migration in the early Ming Dynasty. In this large-scale population migration process, people have a characteristic, that is, there are two toenails on their little toes. Therefore, it has been handed down that the people with six toenails are descendants of people who migrated from Hongdong, Shanxi at that time.