The later Chinese tended to identify themselves with their ruling class. The Qin 秦dynasty (-3rd) yielded the international name China, Sanskrit Cīnā; the Han 漢 dynasty (-3rd to +3rd) lent its name to the usual self-designation of the ethnic Chinese as distinct from the minorities within China as “the Han”. It might be that a Chinese elite for some reason had identified itself with the expanding Scythians. We do find such a reason in the alternative sinification of the same foreign word. Then pronounced very similarly to the character Xia 夏, it is now pronounced Hua and written 華. This character is a self-designation of the Chinese both internally and abroad, e.g. the Chinese minority in Vietnam is known as the Hoa. Its basic meaning is “civilized, elite” (apart from “flower”, with the same character), the opposite meaning of “barbarian”. The Chinese do indeed consider themselves as the civilized ones, as distinct from the barbarians.
Elst, Koenraad (2018). Still no trace of an Aryan invasion: A collection on Indo-European origins. The Chinese self-designation Hua and the root-word Ᾱrya