I wonder if the world is going to be built to any significant degree. If there are powerful cultivators in China, the world history, at least as far as Asia is concerned, should be different, regardless of equivalent people existing also elsewhere (they should exist, though). Yet, keeping that in mind, if you have a look at the surroundings in the chapters so far, you can see it reflects the usual China today, which means the big Western influence of modern science and technology, plus the general Western clothing style in suits (the old man has a Chinese suit, but the manservant, for example, has a typical Western suit, the granddaughter's clothes are no China dress either), which more or less spread nearly everywhere in the world due to power of European and American business practices and diplomacy. If China fared better historically in the universe of this series due to the cultivators, you might expect it would show far less Western influence in pretty much everything. Just like some Middle Eastern countries are going to remarkable lengths to resist it.