4,5
Honestly, this novel is much better than I expected. It has a good setting, it's logical, and it takes all the countries of the world into account. On the other hand, I like how the story takes a shift in perspective and focuses more on being a human-versus-invaders struggle instead of human-human-invaders.
By the way, the main character is calculating and intelligent, he also knows how to fight, and he's not a passionate Chinese protagonist nor does he have hatred towards other countries.
I recommend reading it.