Answer : The same as NOT ONLY some but too many Chinese also present to us, that anything originated from the land of today China must be Chinese stuff , while I haven’t meet with these some Vietnamese yet, but by the same token, these some Vietnamese commit the same categorical mistake as the Chinese do, I mean if they really exist outside of the mouth of either the OP or the “expert” such as Dustin Nguyen.
-END- answering it.
here’s an off topic FYI: The Chinese propagandists always argue that, such and such ancient Vietnamese figure must be a Chinese because of his/her ancestry. But ethnicity is a construct, and thus, one can convert from one ethnicity into another, or to invent a new one, in the case of viet identity, it is a region-centric recognition, thus it would be very easy for the migrants to convert into the viet identity, Trieu Da already attempted to complete this “application” , just read your Chinese history????, if you have a trouble to interpret the classic Chinese text, ask the Vietnamese historians(real ones)for help. However, the Chinese insist to believe in something called “Chinese blood” , and point it out that, this type of “blood” is residing in the fresh of Vietnamese people, therefore comes up with the question in here, “what’s the proof that they are not Chinese ?!” (hence, what’s the proof they are viet instead of Han?????)
The error comes with your categorical mistake, the researchers label a set of chromosomes with the word “Chinese” to associate its regional origin, they can label it with other words as well, but you mistaken it as a proper naming .
I am labeling this thing with the word “duck”(and thus not a proper naming):
Chinese question “what’s your proof that is it not a duck?”
