There is a saying that people with two small toenails are pure Han Chinese, but this argument is not scientific. In fact, the little toe flap is not a specific sign of a population, but a disease of the foot, which is generated by friction.
There is a saying that people with two small toenails are pure Han Chinese, but this is not scientific.
This saying comes from the early Ming Dynasty, due to years of war and famine, the population of Hebei and Henan provinces was seriously reduced, Zhu Yuanzhang and his successor Zhu Di set their eyes on the large population of Shanxi, launched a great migration.
Because they were afraid that people would run away on the way, they tied everyone up with ropes and connected them back and forth. Later, he cut a knife on each person's little toe to make a mark, and the two small toenails were derived from it. Since these migrating populations were Han Chinese, two small toenails became a characteristic of the Han people.
In fact, the little toe two valve is an autosomal dominant trait, in medicine called flap or little toe complex, Western medicine thinks that this is a disease of the foot, is a kind of friction generated by the callus, so the little toe two valve can not prove whether it is pure Han people.