Again you are posting BS. the inhabitants of Guangdong and Guangxi were Tai. We even have Zhuang Tai people living in Guangxi and northern Vietnam NOW.
This is Kinh people's home
It seems you have no damn idea what those scientific papers are talking about.
That migration happened in PREhistoric times, before there were ethnic groups even existing.
In the PREHISTORIC era during the last ice age, the Y Chromosome Haplogroup O did indeed originate in southeast asia. Then these Y chromosome haplogroup O bearers moved in a major migration from southeast asia all the way to northern China.
Then, the Y Chromosome O started mutating into subclades along the way of the migration. Those Y chromosome O people who moved to northern China became Y Chromosome O3a, those other Y chromosome O people in southern China and southeast asia also mutated during their migration, and became O1 or O2.
That was all in prehistoric times. Then in historical times, that means in recorded history, ethnic groups began to form. The Huaxia (Northern Han Chinese) ethnic group formed among Oa3 bearers in northern China, while Baiyue tribes formed among O2 and O1 peoples in southern China. Then, we have the recorded conquests of the Qin and Han dynasty conquering southern China, and the migrations of northern Han to southern China during the Han, Eastern Jin dynasty, Tang dynasty, and southern Song dynasty. Those Oa3 migrants displaced their O2 cousins that they left behind in southern China.