I noticed the Baisha buildings were Tulous as well! I posted it to reddit yesterday, but no one seemed to care :(
Here's another wikipedia article about them:
https://en.wikipedia.org/wiki/Hakka_walled_village
Apparently they're designed to be easily defensible, which would make sense, as Baisha village features an 'infiltration mission' into the Chi You Men's Guilin branch. I imagine we'll be sneaking into one of these Tuluos somehow.
For Choubu, we know it's a "riverside village with lots of shops, souvenir stores, hotels and temples", and that Yu Suzuki travelled to Suzhou in 1993 (as revealed in his Shenmue post-mortem). I hope he'll use it as inspiration, as it's very beautiful, being known as 'the Venice of China':
https://en.wikipedia.org/wiki/Suzhou