Having read the trilogy, I have small runts regarding the adherence to the book (from what I've seen so far it tracks the first book of the series, or part of it). Seen around 7 episodes, so here goes nothing:

Basically, I'm being let down by certain cinematic selections:

* Actors seem to act in this theatrical way. From what I've seen in the last 10 years, in Chinese movies (also Korean and Japanese) this is some sort of de facto way to play on screen. Personally, it alienates me. Would love to see those people talking/acting like actual people. The hardened cop in the book becomes almost a comic relief element. FFS, there is no need to insert to a sci-fi story with a huge drama element these shots of witless humor.

* The books are gloomy. The music fails to reproduce this, having even happy sing-along songs about the end of the world as we know it. Most of the episode duration is dressed with some sort of anxiety-raising beat. Seriously, silence can speak volumes

* Finally there's a lot of scene repeats. Pretty useful for thick-heads like me, since I totally forget what I've seen some episodes ago, but the level of repetition is too much.