I have heard from my parents that DNA ancestry testing is very recently becoming more and more popular on Chinese social media and wechat, unfortunately I don't speak Chinese so I can't read any of their results, so if any ancient steppe haplogroups populations still survive in areas it hopefully will become much more apparent in he next few years.
They did survive, but it remains open to debate:
- Which other haplogroups than R1a were involved and to which extend are they still present in different regions of China
- When did they reach China, with which people (early Indo-Europeans, later Iranians like Scythians, with Turko-Mongol migrations or a mix of these?)
It might become possible to link specific Chinese clans or villages with these or that ancient people in the near future. I too would be very interested to know those results. Do you know what DNA testing companies they are using by the way?