The so-called famous dog is also a continuation of the crossbreeding of fine varieties, and it is not a true purebred.
This is especially true for the nation. Don't the so-called single-ethnic Korea and Japan have the slightest ethnic origin?
As for the definition of modern nation, it is more about the definition of faith, culture, language and writing. Not blood. Xiongnu, Xianbei and Turkic have all lived in some areas here. It is unrealistic to say that they do not have their genes, but it is absolutely wrong to say that they are the main part of the blood relationship of the Han nationality today.