The concept of the childhood betrothal here is doing so much heavy lifting thematically. It's supposed to be this ancient promise between two old comrades, a bond transcending decades, but it's also being used as a weapon, a shield, an excuse. Ning Zhiping pulls it out of thin air to save his daughter, and Chang Fangze has to retroactively explain the whole history - the son who died at the front lines, the tragedy that made the Jiang family withdraw. There's something almost tragic about how these old promises haunt the next generation. The countryside assignment itself is another symbol - this girl being sent away, her future literally being relocated, while all these adults are maneuvering around her like she's a chess piece. And Jiang Heng's sense of déjà vu, feeling like he's refused this before, writing the same words... it suggests fate or repetition, like history is circling back. The betrothal isn't just a plot device, it's about how the past controls the present, how old promises become new cages.