I've seen a lot of 9.0, 10.0 rated reviews of this show on this site, but I had trouble agreeing with that rating. I was interested up to the first half of the drama i.e. Yixi's murder arc and the mystery surrounding it. I'm afraid I couldn't keep up with the convoluted connection between different crimes surrounding the Ye Corporation and the drug/human trafficking going on in Myanmar. I did not find it very interesting and I admit I fast-forwarded the last few episodes. As someone who has watched Korean thrillers like Signal and Tunnel, I found this one a bit lackluster. I also had trouble with the two lovelines. I did enjoy watching Xu Xu and Ji Bai interact, and they were always cute together. The drawings were adorable of course. But I just didn't sense a lot of chemistry between the two, particularly on Ji Bai's part. I never got an impression that he cared about Xu Xu more than any other subordinate, and so the ending scene was a bit jarring for me. Many others have pointed out that the series seems a little rushed, particularly the last few episodes and I agree with that.
The characters were portrayed very well, and I loved the acting. I did feel a little disappointed that Xu Xu underwent so much physical training under Ji Bai and she did not get to show it off except when she shot General Po. I suppose considering how short this series felt, it would have been weird to see Xu Xu suddenly engaging in physical fights, but still I would have liked to see her hold on her own during physical confrontations, even just for a few seconds. This doesn't mean that she was a weak character, far from it in fact. But Xu Xu's strength lies in her mind, and so it felt a little incomplete to have everyone around her help train her but then have no visible results.
All I can say is that this one wasn't for me. I didn't hate it, but it didn't get me hyped either.