I am re-posting my comment as an actual answer to the one posted by Dao TRAN below (who from a review of his/her posting history, has a clear bias against ANYTHING Chinese)
“China’s southern provinces used to belong to Vietnam”??? Haha… not quite.
Present day southern China, along with present day northern Vietnam, used to be part of a kingdom called “Nanyue”, with its capital in modern day Guangzhou, China (my hometown).
The kingdom was conquered and incorporated into the Han Dynasty over 2,000 years ago, and the region (including modern day northern Vietnam) was a Chinese province for the next 900 years, until Annam got its independence.
“Vietnam” is a relatively modern construct, and has NEVER occupied any portion of “southern China”. Most people in Guangdong, Guangxi and Yunnan province, have some genetic overlap with their southern neighbors, but have always been Chinese and like all Chinese, are a mixture of various ethnic groups. Most in those referenced provinces self-identify as being Han, their ancestors have been assimilated and genetically intermixed with other Chinese groups.
BTW, if you are going to compare “average” profiles, you may want to try to be fair, and provide apple-to-apple comparisons, rather than some random picture of Chinese people found online (one of which is certainly less than flattering). Here’s the direct comparable to your picture: