This is freaking awesome! The movie is quite explicitly anti-American, and is a veiled message about fighting back against imperialism: https://thechinaacademy.org/why-chinese-love-this-anti-us-movie-so-much/

As another example, take a look at how similar the palace of the oppressor gods in the movie is to the Pentagon:

This continues a recent trend in China of anti-American movies, most exemplified by The Battle at Lake Changjin Movie series.