I can resume their "beliefs" after so many hours of reading light novels as such:
- Money is their god;
- the concept of "face" take a huge place in their society;
- filial pity MUST be followed;
- They use propaganda through their stories;
- Censorship is an every day occurrence;
- They hatred toward Japan know no bound;
- They distaste toward Caucasian.
You need some references ? There you go:
https://www.webnovel.com/book/7213823205000605/God-and-Devil-World
https://www.webnovel.com/book/7834223205001705/I%E2%80%99m-Really-a-Superstar