That golden serpent makes Lan Wangji smile fleetingly, though Claudius isn't likely to see it, what with his contemplation of his outfit. If Claudius truly wants to dress in this fashion, he may as well do it properly. Lan Wangji stands again and crosses to that wardrobe, reaching over Claudius' shoulder easily enough to slide open a convenient drawer. "Zhongyi," he says, having produced a pair of plain white trousers and a long-sleeved undershirt, "and a skirt¹. At least one robe over those. A sash. I can tie it for you. And then that zhaoshan."

¹The specific word used here pre-translator is chang/裳, a pleated skirt to go beneath that aforementioned middle layer. Also, as usual, MDZS is an ahistorical melange of whatever, so we're partly going on vibes here as to what cultivators actually wear.