What is the best Chinese detective / cop drama

I'm trying to find a good cop show. I've seen when a snail falls in love. I'm just hoping to find more like that any suggestions.

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Thanks for the picks. I saw. Love me if you dare. One of my favorites.  That's what I'm looking for. Ill check out head above water.

I'm going to watch cold case. I saw the first episode today. I like it so far. I just have to find it completely subbed. Day and night I found on Netflix. I look forward to that. Thank you kindly. Any other Asian shows anyone recommend?

Radiation House j drama medical

Two weeks kdrama action and will have a Japanese remake in July

Back to 198 Taiwanese drama time travel

All great shows.

Thank you for the suggestions. I'll put them on my list to checkout. 

Day and Night is amazing and I don't even care for detective shows but I can't wait for season 2.