Lan Zhan just has a really great rack. Her boobs are huge, and Wei Wuxian has wanted to get her mouth on them since pretty much the moment she first met her. This is not new information. What is new information is that Lan Zhan, of all people, has her nipples pierced. Wei Wuxian knows this now, because she saw them last week, and her brain has been running at about fifty percent capacity since, because how is she supposed to think about anything else?