Niuheliang culture:N16M4 chamber believed to be the yellow emperor or yan emperor,identity by his 玉龜(jade turtle),He was also the leader of entire Hongshan civilization.He is O-m117-f2137,A typical Sino-tibetan haplogroup.
another shimao culture,there is two samples C-CTS3385,and O-m117-f2137.
In the legend,they are brothers,it's possible that Yan emperor and Huang emperor both belonged to f2137.
They could be the original spreader of Sino-tibetan language system into china.