On the willows there, we hung up our lyres

As cued, Lan Wangji directs his character to jump. The way these miniature fighters jump is objectively ridiculous -- there's a floatiness to it that shouldn't make sense. To a cultivator, it is surprisingly familiar. He doesn't mind it. Galahad is just as patient as him, and just as calm a teacher as they repeat the same series of moves again and again.