They made a good series based on a simple story. Of course, there were simple mistakes, but the connection of the flow of the series to the past, the boy keeping his father's words obsessed with a measurement event with what was left in his mind. Land measurements and the prevention of a great injustice that has been going on for years are also explained. Of course, issues such as the obstacles of those who have interests, personal conflicts of interest, the burning of age as well as the currency, the perspective of friendship, family, knowledge and skill were also discussed. We also learned that those who remained silent in the face of injustice finally could not stand it and exposed themselves, and that the beneficiaries wanted to silence the public by presenting the bandits as if they were officers. A little bit of romance and a little bit of humor was added and mixed with it. In fact, although long conversations, mathematical equations, dwelling on the measurement techniques of that time were a bit boring, we also experienced emotional scenes. So it's a blending. Ruo Yun was pretty good in the slightly awkward Jia Mao role. Because the personality was somewhat interesting. They mixed quirkiness with a little weirdness, it just seemed like a malfunctioning type to me. I wondered if this is how it should be. The image of a genius in one subject was like a sick type. I guess they saw it as appropriate, I watched it even though I was a little strange. The actor gave this oddity well, but it is debatable whether he should have played like this. After all, I enjoyed watching it. However, it's not perfect. It was a watchable production for those who like this style. The actors were also quite successful. The story was simple but had a complex narrative. Some things were overlooked while others were overlooked too quickly. It was skipped or something, there was a missing breach.