The Round Houses, or Tulou’s, of Southern China (2012)

A bit more info on Wikipedia

https://en.wikipedia.org/wiki/Fujian_Tulou

One thing the author didn't mention is that these are particular to the Hakka of that region.

https://en.wikipedia.org/wiki/Hakka_people

Who were ousted from their home province and settled elsewhere but kept their dialect and customs. Hakka, written 客家 means "guest family."

This concept is so cool. I plan to build a condo complex with a similar community area in the center in the future.