1. Personally, I think it's the world of gods, because all the people who go to Tang Popo to bathe are gods, such as the river god who stinks all over
(here I think it's the author's accusation against human beings for destroying the environment, because when Chihiro unplugs the things inserted in the river god, all the articles for daily use that are abandoned by human beings are poured out. ), and the Kaonashi, is also a god of desire or something.
2. Xiao Bai is the river god, and it was later said that Chihiro once fell into a river when he was very young. Later, the river was filled and people built houses. Xiao Bai was the river god of that river, so they actually met Chihiro when he fell. As for the reason why Xiaobai went to Tang Popo, the movie didn't say it clearly, but I think it was because human beings filled the river that the river god became homeless and finally forgot himself that he ended up in Tang Popo.
3. Kaonashi doesn't have any special background, but he is a very special character, seemingly kind, but turned sinister because of others' rejection, and finally turned over a new leaf in Qian Popo. I think this role represents loneliness, emptiness, and a desire to make friends with others, but it has been rejected repeatedly, which has become very terrible. On the other hand, this role also reflects people's greed for money. In short, I think this role is very neutral.
4. Chihiro, who remembers correctly, should have gone to Qian Popo to apologize, because Xiaobai stole Qian Popo's seal at the instigation of Tang Popo. The reason why Xiaobai vomited blood is that there is a guardian spell on the stolen seal of Qian Popo, and on the other hand, in order to manipulate Xiaobai, Tang Popo cast a spell on Xiaobai (that is, the little black bug trampled to death by Chihiro).
5. It is also said in the film that the headrope is made by everyone and is an amulet.
6. Xiao Bai told Chihiro not to look back. One possibility was that if he looked back, Chihiro would not be able to return to the real world, so he had to stay here. Second, I think it is also the author who wants to express the idea of "don't look back, don't regret, don't miss the past"!
These are my own views on this film, and I like Miyazaki Hayao's works very much, especially this one ~ ~ ~