This Sci-Fi Chinese drama is a rare one. Keep in mind this is not a drama for everyone.
However try watching it before reading the reviews (as I did).

I rarely review chinese drama but here we go.

First of all... the story. It may seems like a virtual reality world kind of drama but as the story grows, it gradually become a story about altered memory. The writer guided us from the start as if Jiang Xiao Yuan (JXY) traveled through time from 2025 back to 2018 where she met Qi Lian (QL). Whilst QL took her as his old love interest but JXY had no memory of it thinking she occupied his old lover's body. They went through a love-hate relationships throughout the story to find the truth and tried to find ways for JXY to go back to her original world. They clearly were attracted to each other but their pride got in the way. If you are looking for a romantic genre, this is not one. So don't get your hopes on high on this. There's some light romance story but that's it.

However, there was a plot twist towards the end (writer took us on a roller coaster ride) where both JXY and QL found that there was no time travel or other parallel world. It was actually an altered memory where JXY joined as trial experiment participant (Lighthouse system) to earn money for her grandma's medication. It turns out that QL was also one of the earliest participant of the Lighthouse system owned by the original creator (Noah aka Xu Jing Yang-XJY).
JXY altered memory experiment was done by Fan Xiao Xiao (FXX) who stole the whole experiment from Noah, as FXX did not have all the data (and apparently Noah installed a pre warning to QL if his experiment is being used), JXY altered memory showed some problems. Whilst QL was a success story, FXX was not (she experienced some setbacks after the experiment hence she stole the whole thing to make things right).

After the whole roller coaster ride story of both QL & JXY life, they eventually got together and be honest to each other.
Along the way come this new character, Jiang Bo (JB) as the adopted son of FXX and serve as bff for both JXY & QL. He was used and abused by his adopted mother FXX so severely that he kinda lost hope in life but JXY made a great impact in his life that he pull himself together and start living life the way he want it.
In the end FXX was defeated and captured and JXY, QL and JB did live a happy life in the end.

Okay, story wise it may seems boring at first and some parts of it (especially about the make up thingy, salon thingy) but overall the mystery surrounding Lighthouse System and whether XJY did exist as a person or not were intriguing enough for me to keep following the drama from start to end. It did give us a satisfactory ending and would love to see more romance but as the genre it is, I'm satisfied it is. (A follow up wedding of JXY & QL would be nice though).

Lin Yi as an actor always delivered his acting excellently. No doubt he is not just a handsome one but great in acting as well. All his facial expression clearly shown throughout his acting. Love seeing him taking different roles in acting (not just romance genre all the time). Will definitely looking forward for his next projects.

Liu Hao Cun is considered newbie in acting world but her acting amazed me. Then I found out that she was handpicked by the renowned directy Zhang Yi Mou, no wonder she was really good. Her height difference with Lin Yi was really cute and they made a great couple. Looking at some BTS in the drama, shes actually really cute and playful. I know there's a lot of negative comments about her acting but for me, I watched her first before I read so it didn't really bothered me as for me her acting was on point.

All of the other actors were really great too and funny at times. I really like the actor playing Jiang Bo as not only handsome but did great too. Also the one playing Cheng Fang Zhou, he was really funny and loyal throughout the series. I really despise the character of Fan Xiao Xiao (the actress did really good though) to the point that I hate seeing her when she came out in the series (haha). So in my opinion all of the actors did well.

Overall, it was a great drama and I rarely find a sci fi chinese drama really good like this that kept me on edge when watching it. Dramas that made you wait for 1-2 eps everyday and watching in patiently must be really good or interesting.
So don't hesitate and start watching it especially if you really like sci-fi drama like this. I will definitely re-watch it again sometimes later.
I hope you'll enjoy it as much as I do. Enjoy ^^