The Mansong tea metaphor is everything and I'm not even being dramatic about it. Yun Juan explains that the tea leaves stand upright instead of sinking, and she connects it to the rivers and mountains of Great Zhou, saying they stand firm and never fall. This is the thesis statement of the entire novel disguised as a tea tasting note. Everyone in that room is playing a political game, floating on the surface, sinking or swimming based on convenience. But Yun Juan, who claims to be simple and obedient, is the one who understands what it means to stand firm. And the candied hawthorns, oh god the hawthorns. They look sweet on the outside, red and glossy and inviting, but they're actually sour. Yun Juan knows this, she eats them slowly, savoring the surprise. Xiao Lanting pretends he doesn't notice the sourness because he doesn't want to embarrass her, or maybe because he's already accustomed to sour things in his life. There's also the recurring motif of doors and curtains, the way Yun Juan keeps lifting and lowering the carriage curtain, never quite committing to watching or not watching. She's always half-hidden, half-visible, which is exactly how she exists in this world, never fully seen, never fully safe. And the folding screen from that first dinner, separating her from the negotiations, becomes a symbol of her entire position, present but divided, participating but not involved. The author keeps returning to these images of partial visibility and hidden truths, and it all comes back to that tea, standing upright in hot water, refusing to sink.