https://www.jimmynelson.com/peoples-places
This website, though focused on all folk cultures, is one where I was able to find information on folk cultures in East Asia. It provides a substantial amount of information, as well as many images, of folk cultures for many different people around the world, including 4 based in China.
This could be used to examine folk cultures in China and see how though it is rapidly developing and urbanizing, there are still many places where there is a traditional culture that is unique.
It could be used to compare to other modern aspects of China. It can also be compared to folk cultures from around the world.