O3a is not Chinese,Sinitic or even Sino-Tibetan,it's too old,more than 20000 years old(even older than N-M231 as a whole,and N exist in many nations),in that time,no Chinese exist
And O3a-M324 exist in many nations too,Sino-Tibetan,Hmong-Mien,Altaic and Japonic-Koreanic,the relationship is...