Some people say that northerners are descendants of Hu people. What is the basis?

Because of war, famine and other factors, great changes have taken place in the population migration in the north. At the end of Jin Dynasty, Yuan Jun washed it again, and at the beginning of Ming Dynasty, Yan Jun washed it again. Most of them should be Han Chinese, and Han Qi didn't get married in the Qing Dynasty. For example, my family was an immigrant from the Ming Dynasty, belonging to "people from the south moved to the north". According to genealogy records, the ancestors were Huainan military families who swept the north with the prince in the early Ming Dynasty, and later they were reduced to farming for a living, just like ordinary civilian families in the late Ming Dynasty.