Lan Wangji's fluidity of movement is impressive; it's not quite telegraphing his next move, but there's something dancelike about it that makes Lancelot think they could easily get into the flow of sparring. They've sparred several times now, and Lancelot is starting to think he might understand Lan Wangji's forms and how they may differ from those he has learned. Bichen's sweeping arc does make him have to recalibrate and dodge backward, chuckling a little as he puts some space between them to reset his own stance.