The number one reason why I love this manhua, is because I've trained/studied as an appraiser myself, have dabbled in antiques, and real estate, and the occasional jewelry as well.
Even though most of what I learned applies to Japan, Korea, and Europe as well as a bit of North America, I can still relate to the Chinese side too, since I have studied some of its history.
Appraisers can make big bucks if done right, but it's a job that requires extensive reading/researching and requires a very good memory, so it's not very appealing to college/university students. At best most people who enter the world and art of appraisal enter the real-estate market of buying and selling old houses.
People like me who have spent 10+ years in antiques are really rare, not as rare as finding an actuary, but still pretty rare. I'm not 30 years old yet, but I'm not young enough to be considered a young appraiser either, some appraisers start learning at the age of 2 (especially traditional families that have made a name for themselves through appraisal). I started when I was 14, so that's that.
I'm best with modern paintings and figuring out the best price for them, so I often work with painters both veteran and fresh-graduate as well as many amateurs online. I can, on occasion appraise antiques as well as buildings, but my talents lie mainly in identifying paintings.
So reading a manhua like this that has a bit of everything, it gets my blood boiling and excited.
But also as Kuraiaku has mentioned earlier, even real-life appraisers don't give flawless explanations like the MC. You'd have to be a genius with photographic memory to do that, and in the history of appraisal, we've had enough geniuses to count on one hand...
Fictional appraisers? Sherlock Holmes. xD Knowing what a person's background and occupation is by their appearance and behaviour, is a type of appraisal, and there are actual university courses that teach it, but most are self-study. Recognizing a person's talent and potential in a certain category, is one of the characteristics of an appraiser. All the top musicians that end up being judges for auditions and whatnot, they are a type of appraiser too.
But we're talking about "material" appraisers, not human appraisers. If you can judge a person's worth by looking at them and seeing what they're good at, you have potential talent for appraisal aptitude.
Appraising is in everything we do in this world, so we may not notice the importance of it.