Before I say anything I would love to know if Zhang Ruoyun is actually a genius in real life. This is the third drama am watching him (After 1. Joy of Life 2. Sparrow) and he's still not disappointing. And why is he always a genius when I meet him. It's too early to review after just 4 episodes but 4/14 is a percentage and with such a drama every moment is worth it.

1. STORY
I wont say much because I don't want to spoil for the ones that haven't started. So I'll generalize and say it's a wonderful story in a wonderful world about a mathematical genius in those historic times. And so far so good on that part, no disappointment in the scripts. I wonder how rich he would have been if it was actually someone living among us in our current world with these betting stuff and lotteries. It's a story worth your time, so if you haven't, then better go ahead.

2. CAST
This part they really got me. Ruoyun(ML also in Joy of Life and Sparrow), sentiments aside, was the only best person to take on this role. He does it so well and as I said, he actually looks like the genius he plays. I wouldn't imagine anyone else in this role but maybe Yang Yang (ML in Who Rules the World) would have given it a meaning but in this case he can't beat Ruoyun.
Next perfect placing was the second ML(Also second ML in Lost in the Kunlun Mountains). I watched him last just recently and he's a top notch actor. He's always beside top talents 1. Xu Kai in 2022's Lost in the Kunlun Mountains 2. Zhang Ruoyun in 2016's Joy of Life. and now once again with Ruoyun for the second time am watching them together. He should quit acting acting and become a head of police or a huge business person (Lol, just joking, he has that face).
Over to Wu Gang who also am watching second time together with Ruoyun after Joy of Life. This 'old' man is a talent and he does so great as a villain. I wonder what he would look like if we met on the road. Scary? He reminds of Jin Mu in 2022's KDrama Alchemy of souls.
**This casting was so good and having such three high profile actors would be beneficial to any set-piece.**

MUSIC
The OST is great, not too much noise with vocals and personally I like it that way. The OST carries you into the episode and prepares your brain on what you're about to watch and the world you're about to enter. I liked the same from Princess Silver, Sparrow, Royal Nirvana, Nirvana in Fire, Game of Thrones, Westworld, HOTD and a few more(On the Hollywood side, not Asian), Martial Universe, Legend of the Phoenix, …
Not too much of SFX and it's great where used.

REWATCH VALUE
So far so good, the 4 episodes are rewatchable but early to determine if the rest will be up to standard which I hope they will be.

OVERALL
A must watch if you love historical dramas. Good acting and production. Good story. Let's meet when it ends. Happy watching till then.