“Considering the presence of haplogroups H and K in the Xiaohe people and the geographical distribution of shared sequences, we conclude that the west Eurasian component observed in the Xiaohe people originated from western Europe, and maternal ancestry of the Xiaohe people might have close relationships with western Europeans,” Li and colleagues note. By the Bronze Age, the people buried at Xiaohe cemetery were already “admixed,” coming together millennia earlier in Siberia and Mongolia.
https://www.forbes.com/sites/kristinakillgrove/2015/07/18/these-red-haired-chinese-mummies-come-from-all-over-eurasia-dna-reveals/ 