Gong Zi is the actual male lead here. The whole story runs by him. The female lead is so stupid to fell for Chang An just because he taking care of her has the servant.
From start, I watched this drama by considering NS3 was just a robot who is trying to learn feelings then the whole drama felt like dumb. So-Bong char felt like she needs a comfort doll-like NS3. I felt like she is a teenage girl who is trying to protect her intelligent doll from others who are trying to use it. And every1 is trying to stop human NS mother to destroy NS3 by saying that NS3 calls you "mom" "how can you kill him"...Come on guys NS3 is programmed to behave like her son, of course, he calls her mom affectionately. Even if, we create a perfect robot with emotions it's impossible it acts and thinks like a real human being.
Among all AI dramas I watched, in this drama, I didn't like the romantic part between android and human because of human NS.
In this drama from start, the romance is supposed to be in between human NS and So-Bong actually real NS need love from some1 (so-bong or NS3 or both)more than NS3. So-bong love to NS3 is not real because his every action are programmed(like hugging strangers who cry, real humans don't it but some just console normally). SB fell for these actions just because he is nice, caring and unique. Then in all romantic dramas, 2nd lead who is nicer than the main lead suppose to get the main actress. NS3 character didn't go through child trauma, pain, hurt, loneliness like human NS. And scientifically proven that love happens when there is a chemical reaction between heart and brain. For NS3 love is not possible.
or
https://kissasian.sh/Drama/Hua-Jai-Sila
Among all AI dramas I watched, in this drama, I didn't like the romantic part between android and human because of human NS.
https://www.dailymotion.com/hatailoi7/videos
Episode 11-24 Raw Links: https://ondramanice.io/drama/tientsin-mystic-detail
11 to 24 English Subs: https://dostforu.blogspot.com/2018/02/english-subs-for-tientsin-mystic.html