What struck me when I first started reading Cixin's trilogy was an interesting semblance to Le Guinn's style and general interest in sociology. Both are similar in that they like to re-think political structures and processes, something that differentiates them in my opinion from other giants of Sci-Fi like Philip K. Dick or Stanislav Lem (who deal more with psycho-philosophical questions). Anyway, this specific book deals quite a bit with the following question: Is humanity worthy of living in the paradise which is called Earth, seeing how we are so bent on destroying it's robust ecosystem? I found it to be a timely question for the era of Climate Disaster, well discussed throughout the book. It might be also worthy to mention that Cixin writes extremely well, and the suspense is held very tightly throughout all chapters. Cixin really really loves science, and this is a very very sciencey science fiction book.