The message of TBP is hopeful in that the US and China are ultimately locked together against a universe of unknowns.
It totally goes off the deep end there at the end though, but this would be a hard book to write while living in China. The CPC wouldn't allow this kind of propaganda to be sold to the West if it didn't basically follow their party line. I mean, the author basically telegraphs this situation with the subplot about how the Terrans learn how FTL travel works.
[1] https://futurism.media/dune-and-oil-the-real-world-influence...