[Travel] + [Knowledge Flow] + [No Harem] + [Strong CP]
The whole book uses "account books" as a clue and progresses step by step: from checking business accounts to checking people's hearts and finally checking the fate of the country. Lin Bufan completed the transformation from a stern science man to a warm-hearted reformer, while Shen Qingqiu grew from an entrepreneurial female shopkeeper to a public opinion leader. The core of the story is not only the thrill of the battle of wits, but also the exploration of how advanced thinking warms up ancient civilizations. In the end, Tingyulou transformed from a business into an institutional cornerstone symbolizing justice and hope, interpreting the profound theme of "all things are reborn from the ashes" and composing a magnificent song that resonates with reason and humanity.