Take "pain and pleasure" as the surface, and "keep and seek" as the inside. The ultimate "abuse" (family changes, the changing world) is used to pave the way for the ultimate "shuang" (counterattack, redress of injustice), and "shou" (the male protagonist keeps the right path, and the female protagonist keeps one person) and "seeking" (searching for the truth, looking for each other) throughout.
