Afanasievo people may well have been proto-Tocharian speakers (Ning et al. 2019)

Update 17/08/2019: A surprising twist to the Shirenzigou nomads story ... During the Early Bronze Age, around 2,900 BCE, a population associated with the Yamnaya archeological culture migrated from the Pontic-Caspian steppe in Eastern Europe deep into Asia, as far as the Minusinsk Basin in South Siberia. This rapid, long-range expansion was likely to have been the first significant migration

* This article was originally published here