@CianoLiam The Chinese language is. Genetically speaking, Han (Longshan) is Yangshao + Dawenkou, Dawenkou itself is a mixture of Shandong HG, Yangshao, and Huai-Yangtze related ancestries. Linguistic ethnogenesis occurred separately after Longshan was formed by relict Dawenkou and Xia.
@CianoLiam Tibeto-Burmans, Qiangics proper, branched off before linguistic “Sinicization” and genetic “Longshanization” and migrated counterclockwise from the loess plateau to southwestern China/Northeastern India/Myanmar by the late Neolithic. Sanxingdui comes from this separate wave.
@CianoLiam Qin originated from Northwestern China, though uniparentally it can be traced back to Shandong. Its conquest of Shu had no influence on its ethnogenesis. “Qiang” is misleading since every single Sino-Tibetan language derives its oldest and base layer from the Qiangic language.