Some Chinese study on leg length ratio. It seems that in China based on studies, Northwest China and minorities (Tibetans and Kazakhs) have the longest legs to torso height ratios. Hubei on the other hand has the shortest limbs to torso ratio. Interestingly enough, Shandong is also rather long torso. The rest of the provinces just seem the same range.

I've met a decent amount of Chinese Filipinos and I think genetically, they are bulk fully Chinese thought might behave less Chinese than Chinese Malaysians, who strike me as super Chinese?

Yeah that would explain why Chinese Thais are the most assimilated. Estimates show that 9 million Chinese people are in Thailand but I'm gonna assume many of these are not fully Chinese

Anglosphere raised Chinese are mostly able to speak and have some Chinese skills, although they might be weaker in writing.

That's because the Southern Chinese tourists in Thailand come from all over Southern China, whereas Chinese Thais are mostly of Teochew or Hokkien origin. Like I mentioned earlier, people who aren't familiar with Southern China would often consider the region to be a unified whole, but that's definitely quite far from the truth, since there're quite a lot of diversity in the region both within and among different Southern Chinese provinces.

And regarding Thailand-PRC relations, although the Thai government might not be overtly pro-China, it's a far cry to call it anti-China. In fact I would consider Thailand to be one of the most friendly countries to China in SE Asia and perhaps in the entire world. For instance, Thailand is one of the most loyal customers of Chinese arms export, they've bought many equipment from China including frigate, armored personnel carriers, amphibious tanks, main battle tanks, etc. Thai military started to buy Chinese equipment 3 to 4 decades ago back when the Chinese arms industry itself was just beginning and the quality of the equipment they could produce at that time was far worse than today. And with arms sale most of the times you're not just buying the weapon itself, there's an underlying political connotation as well. And just recently Thailand has become one of the first countries in SE Asia and perhaps in the world to openly welcome the first major wave of Chinese tourists since the outbreak of the pandemic, even the vice president of Thailand was there at the airport and he gave out wreathes to every Chinese tourist descending from the plane, and the Thai crew at the airport held banners written in Chinese characters "中泰一家亲" (China and Thailand are one family). Such a gesture caused a sensation on Chinese Internet and warmed the hearts of many Chinese people. Not to mention that the current Thai princess (forgot her name maybe you could enlighten me on this) often went to China to participate in major events, I remember the last time she was in China was back in 2019 for the 70th anniversary of the founding of PRC, and she even went to the Zhuang autonomous region and danced with the Zhuang children. 

It's great that you want to get in touch with your roots, but I don't want to blame those Sino-Thais who had forgotten their roots and fell for the soft power of Korea and Japan cause that's just the way it is China has nearly no share whatsoever in the global entertainment industry. Thailand is a country that I'd like to visit in the future, and I'm very grateful to the kind gestures of the Thai people.

I disagree with the Lingnan Chinese part, I think a lot of Lingnan Chinese I've seen (particularly those from Western GD and GX) are more SEA-influenced than shirvanshah and his siblings. It's true that his siblings have a slight Siamese vibe in the lower face, but overall they still give me a Chinese or East Asian feel, especially their eye region looks very northern-influenced, similar to Mandarin Corner's type.

The Tibeto-Burman influence in MSEA has been grossly exaggerated, both in terms of genetic contributions and cultural contributions. In terms of genetics, I think the three main contributors of modern Thai peoples are Mon Austroasiatic-speaking natives, Tai-speakers from Guangxi and Yunnan, and some Teochew and Hakka influences, whereas the Tibeto-Burman influence is minimal and is mostly limited to the underdeveloped hilly regions of northwestern Thailand. Even the Burmese probably have higher Austroasiatic-related ancestries than Tibeto-Burman related ancestries. And in terms of culture, much of MSEA belongs to the Indosphere and derived much of their culture and religion from the ancient kingdoms of India.

The more likely reason for Thai Chinese being better assimilated than Malaysian or Indonesian Chinese is that Thai people follow Theravada Buddhism, which is much less exclusive than Abrahamic religions. 

Yeah I think most ABCs here go to Chinese school when they are younger and speak Chinese at home with their parents. I have not met any who cannot speak Mandarin.

Also they have high rates of Weebism and animewatcher. Why do Asians like anime so much?

@mnops I think comparing whose nose is pointier in East Asia is pretty pointless, as there are flat and sharp ones on both sides

How about my paternal cousins (kids of my uncles and aunts) that I posted earlier: do they also pass in those regions you mentioned or are they a bit more "northern" than me?

Don't have pics of my maternal relatives as they tend to be all old age now and they don't use social media.

I think you are right. When I was traveling in Hanoi with my two American friends (one who is half Jewish half Pino, another who is half generic White American half Jewish), the Vietnamese were able to tell that I'm not one of them, except only one time where a staff at a restaurant speak to me in Vietnamese first, but later change to English when she noticed I don't understand the language. But I don't know is it because I was traveling with my friends which makes it easier to be recognized as foreigners, or was it because of my fashion sense and height that is different from the Viets as I was taller that literally everyone there lol.