Worth a watch but execution could've been better

My favorite parts:
1. End of every episode, there's a fact about actual history. If you enjoy tidbits, this is very enjoyable
2. Production Quality: From head to toe, the costume and accessories are incredible for the rich. Sets are fancy, especially that bridge.
3. Story, each of the mystery ties to the bigger mystery
4. Seasoned cast. Most (not all) were suitable for the character. Younger version of the FL did a wonderful job!
5. Some subtle humor: from the Dad & side kick investigator Wan Fu
6. Family dynamic

Where it didn't work for me:
1. FL (Bai Bai He). I liked her in other dramas, but I think for this role, it's a miss. The younger version and older version mismatch in energy level & personality. Bai Bai He gives off a sleepy vibe the entire drama her line delivery also felt kind of flat.
2. Lack of emotional connection for the victims. I think only Song Qi Yi case was executed properly. Characters must be built up for that emotional factor.
3. Main investigator Gu Zhen, didn't do much "investigation" and didn't have many lines.
4. Several females (including the FL) suffered over skin smoothing, so much so that you can't see any texture.

Still enjoyable story overall