My take on the migration path of Austronesians is as follows:
1) There was likely a "proto-Austronesian" or "proto-para-Austronesian" like group living somewhere around coastal Shandong which grew a crop of mixed millet and rice when rice agriculture was more conducive in that region's climate. This population was able to grow large in population and hence expand.
2) One group ended up in southwestern Korea where they became admixed with local hunter-gatherers (probably associated with O1b2 yhg) and acted as a sort of "rice culture" transmitter to the KR/JP/"Yayoi" people. Austronesians have a distinctive non-patrilineal culture which is shared with Japanese in which families are organized into "houses" rather than father-son-grandson etc. lineages, in which case people of native yhg (O1b2) would not be "suppressed" as much despite likely being less agrarian-heavy (they would simply be adopted into para-Austronesian "houses"), which explains the yhg differential between Austronesians[see note] and KR/JP/"Yayoi". Another group ended up moving southwards. No group was able to substantially impact westwards since that area was already occupied by high populations of Sino-Tibetans, tentatively Hmong-like peoples, etc.
2) Upon reaching Yangtze Delta (perhaps Zhejiang specifically), the southward population branched out into two- here, one group went straight to northern Taiwan (the geographical placements of Taiwan archaeological sites would support this) and mixed with some amount of local Onge-like peoples. The other group migrated along the continental coastline and admixed with local plausibly Austroasiatic-like populations living around Fujian
3) The continental ones kept going further west and at some point hit inland far south China, where they were now admixed with Austroasiatic, Hmong, Sino-Tibetan etc. and became what we know as "Tai-Kadai". The oceanic ones migrated to the northern Philippines, where one branch directly sailed into the Pacific and became Polynesians upon mixing with Melanesians/Papuans. Others went down into the Phillipines, Malaysia, Indonesia etc. where they mixed with various amounts of local populations (mostly either Onge-like or Austroasiatic-like)

This pathway imo makes the most sense and also explains why groups like Koreans and Japanese seem to have heavily "Austronesian-adjacent" tendencies at times despite being located far from Taiwan, as well as explaining why the SEA-like input in Shandong and Jiangsu Han is actually more "pure" "Ami/"Atayal"-like than in say Fujian Han despite the latter being more geographically proximal to Taiwan

Note: referring to eg. Taiwanese aborigines here. I looked at Austronesian yhg tables in greater detail and found that they varied widely from place to place (some Polynesians were even majority C clades), which is likely a result of the non-patrilineality culture I described here

Outside of Fujian, where else are their looks very common? 

Really? Only the other cousin and not his sister and brother right?

Things have been quite busy, thanks for asking!  How have you been during the last two, three years for you outside of anthroscape? I'm sorry to hear that you have been called various names by keyboard warriors for your preference in SEA and FSC chinese women - it sounds like there is still a lot of development to be had in that area of intra-group relations among the PRC individuals. I've also heard that there is somewhat of a stigma attached to individuals voicing a preference for northern Chinese women, as well, but you and others can correct me if I'm wrong.

As for myself, I feel like I have witnessed a seismic change in people's perceptions of Korea/Koreans, including people's stereotypes of the Korean "look" due to the explosion of Hallyu, even since the last time we were on anthroscape in early 2020. There are many videos on youtube and other platforms that show how even regular Koreans traveling to various countries have been the beneficiaries of this phenomenon, with all types of non-Koreans learning Korean and engaging in the social fabrics of the stories presented in the likes of Parasite and Squid Game, the raw social commentaries of the K-noir genre that are presented without much embellishment. I do not encounter too many outrageous statements attacking Korean looks (or preferences therefor), both online or offline, anymore. Even Kpop reaction videos that start out as amateur fan-based have largely spawned a new culture of professionals analyzing the more technical elements, including vocalization techniques, narrative/canonical elements (since each Kpop group of the 4th gen has its own universe, akin to fantasy worlds), post-production editing and cinematography, rather than just focusing on the "visuals" and aimlessly contemplating on whether they are natural or artificial. So it appears that increasing soft power on global fronts does truly help to mitigate any surface-deep animosities or misconceptions people have about each other. I hope that this phenomenon can extend to other Asian powers in the coming years.

Thanks for the more detailed explanation. I can better see your pov on the similarities, and appreciate your examples on the lingering vagaries of Confucianism in the Sinosphere that are common to both N.China and Korea. I also largely agree with you on your analysis that Korean culture can be best thought of as an intermediate or composite of N.China and Japan. I think the results from a recent World Values Survey should interest you (below), because it really visualizes that intermediate space that Korea often occupies vis a vis the other EA countries, while also being unique on its own -- when asked what values should be inculcated in children, Japan emphasized more "creativity", while China emphasized more "hard work" -- Korea was the only country that truly emphasized "both". Since the 90s, I think Korea has largely been moving towards this distinct cultural space within EA, where it's simultaneously both and neither of (N-)China or Japan, and the same movie that you reference with respect to teachers publicly fat-shaming children are more or less socially outlawed in 2023 Korea (sometimes to the point of being extreme on the opposite end of the pendulum, with children being too much protected/spoiled), the evolution of which is made into motion-picture films like Juvenile Justice or Extraordinary Attorney Woo (both of which were global hits of 2022).



And sure, I'd be happy to provide my thoughts on the similarities between N.Chinese and Korean phenos - if you have specific videos/pictures you want me to look at, I'd be happy to do that. I'm too lazy to go through this entire thread, so directly give me a shout-out for any of the ones that you or others may have sought my thoughts before. In general, I do think there's an overlap, but I have to think a bit more about where that overlap starts and ends - my observations so far are that NE hebei and Dongbei seem to have (obvious) overlaps, but more inland N.Chinese regions may have their own unique looks that may just be more confined to their regions. But feel free to send me any that you want me to comment on directly, thanks.

FYI we can't see "closer up pics" on a person's Instagram profile if it's set to private. Also we can't see any photos in your second FB link even when logged in.

Yangtze Delta seems like a stretch from what I was able to see but I guess anything's possible. 

shirvanshah

What is your phenotype again? I think your relatives are mostly far south Chinese looking