I wasn't sold with show's premise at first but I continued because of the nice cinematography and directing. Characters started growing on me and I'm fully invested with the story now. It's very well-acted, has fleshed-out characters, nuanced relationships/dynamics, strong dialogue.

The side arcs/plots are neatly done and always connected with the main plot. Most episodes might seem slow-paced but it's not boring to me at all. Conversation between the characters are interesting and adds to the story. I also personally like the complex politics between the different factions (police force, rival drug gangs etc) and how characters interact within them.

Top 3 characters at the moment: An Ran, Chen Yu, Wu Zhen Feng