Away From Here.

He wants to get a chance to talk to Wen Ning alone, but that's clearly not worth sticking around for.

Also, he should get the Yin Iron to Xichen to be sealed as soon as possible. Obviously that is the reason he's walking so quickly and there are no other reasons.

Jiang Cheng debates whether or not to leave too.  Wei Wuxian is probably going to engage in shenanigans by "subtly" asking for clues about what they're looking for in Cloud Recesses for the whole time he's being examined.  Jiang Cheng isn't going to be able to stop that.  The only question is whether or not he'll have to watch it. 

In the end, he decides to wait for Wei Wuxian and make sure that he doesn't drag the Wens into any trouble.  Perhaps if he looks disapproving enough at antics they will stop happening?  

Lan Wangji is such a strange and mysterious person. Who could possibly be expected to predict his moods?

Wei Wuxian starts to march after him, indignant, but Wen Qing clears her throat.

"Young Master Wei. I still need to look at you." She looks wholly unamused. 

"I'm fine, I'm fine, I'm really sure of it. Why is Lan Zhan allowed to run off but not me? Is it because you assume I'm less capable than him? Wah, Lady Wen, that really hurts my feelings. Lan-er gongzi and I were evenly matched in a sword fight just the other night, did you know that? He's just as likely to twist his ankle falling down a river as I am, seriously."

"I don't know anything about how capable you are, Young Master Wei, but I can tell when a person is careless. Sit down." She uses her very stern doctor voice. Also her big sister voice. These are the same voice.

He's so oppressed. All of his new friends are so mean to him, Nie-xiong really is the only person he can trust. 

He does sit, though, because he has unfortunate conditioning to the presence of big sisters. It's not fair at all. "Well, Jiang Cheng, at least tell me what I missed. Was class as boring as the saluting ceremony? What have you and Wen Qing and Wen Ning all been talking about?"

Oh good, he's actually sitting down.  

Wei Wuxian's reward will be a less angry recap of the lesson.  It didn't involve reciting all of the Lan sect rules, which puts a lower bound on how boring something can be.  

Still sounds extremely boring. Wei Wuxian isn't sad that he missed it at all.

Wen Qing eventually proclaims him uninjured. "Now you should go find your sister and stop worrying her."

Aw. He doesn't want Wei Wuxian to leave. Wen Ning hasn't even gotten to talk to him yet; he can't think of anything to say in front of Jie and Jiang Cheng that wouldn't get both of them in trouble.

"Jie, can. Can we go with him?"

"We have other things to do, A-Ning. Let's go." She bows neatly to Jiang Cheng. "Until later, Young Master Jiang."

The Wen siblings walk off.

"She didn't even bow or say goodbye to me, did you see that?" He tsks and shakes his head wonderingly. "No wonder you two are suddenly getting along, Jiang Cheng, she's almost as mean as you are. Why were you looking together? Did you find anything out, did she tell you anything about Wen Clan's plans?"

The plans probably include the Yin Iron, which Wei Wuxian is very excited to know about before everyone else, but there's still plenty more that could be found out about the Wens' intentions.

Jiang Cheng isn't going to tell him about the future, and they didn't talk about much else.  

"We'd only just met up before you came along."

Sigh. "That's not very helpful at all, Jiang Cheng. Hey, why do you think Lan Zhan left all of a sudden? I thought we'd been getting along today, too. Maybe he hates doctors?" He giggles. "That would make my day, if Lan Wangji is afraid of tiny needles. Or maybe he doesn't want to let girls see how cold and rigid he is so he had to escape quickly. Ah, I bet that's it."

"Lan Wangji doesn't seem interesting enough for either of those.  Why did you decide to go walking with him?"

He shrugs. "I wanted to see what he was up to. And I wouldn't have minded another fight! You say he's uninteresting because you haven't seen him fight, Jiang Cheng, he really has some skills! Maybe he traded facial expressions for pretty fighting, and that's why he can't be interesting the rest of the time."

Was that it?  He supposes that makes sense.  There aren't many people his own age who fight with Lan Wangji's skill and grace.  Who could match Wei Wuxian and give him a proper challenge.  For someone not prone to jealousy, perhaps it was only natural that he'd keep seeking him out.  

Not that he can agree aloud, having not yet seen a fight for himself in the past.

Nie Huaisang had also joined the search for the missing students. 
 
Lan Wangji had apparently taken Wei Wuxian somewhere.  Or more likely gone somewhere and not given Huaisang warning to try and distract Wei Wuxian first.  It might not always work.  It certainly wouldn't work forever.  It would probably eventually end up in Nie Huaisang being dragged along into their trouble at some point.  But he could have at least tried this time if Lan Wangji had thought to ask.  That, and not gone in either the middle of the night or very early morning.  

Or possibly someone else had gone back in time, kidnapped Wei Wuxian somehow, and Lan Wangji had gone after him?  Though, no.  That would be very difficult in the middle of the well-guarded base of a powerful sect.  Wei Wuxian might not yet be the Yiling Patriarch, but he was a capable fighter - that alone eliminates most people.  Also, it's only been a day.  He knew from first-hand experience that plans took time.

He runs into Wei Wuxian and Jiang Cheng as they're walking back.  

"Jiang-xiong!  You found, er, one of them?  Wei-xiong, it's good that you're safe.  Lan Wangji isn't with you?"

"Nie-xiong! Lan Wangji was with me, but then he got scared of a girl and ran off, can you believe it? Who knew the Second Jade of Lan was so cowardly." He bumps his shoulder against Nie Huaisang's good-naturedly. "It's good that you're safe after having to survive such boring class. Did you get to do anything fun today, Nie-xiong? Did you find anything out?"

"Class was dreadfully boring.  Everyone had to sit still and listen to the lecture.  Afterwards, Master Lan began making us answer questions.  You're lucky you missed it.

"Was the girl Lady Wen?  She does seem pretty intimidating.  You seem brave enough to not be scared though.  Did you get any clues by talking to her?  She was at the lecture, but none of us could talk without getting scolded so I stayed quiet."

"It was Lady Wen! She didn't tell me anything, even when I was extremely charming. Jiang Cheng was with her and her brother when I found them but apparently he didn't get a chance to talk about anything exciting either." He shakes his head sadly. "What do you think, should we try to sneak into their rooms and look around?"

Nie Huaisang probably shouldn't encourage that.  He doesn't want to get caught again.  Lan Wangji and Nie Huaisang already both know about the Yin Iron due to being from the future, making the entire trip useless.  He will nervously fan himself and demur.  "Oh, I couldn't do that.  It's much too frightening, between the chance that Wen Qing will catch us, or the chance that Master Lan or Zewu Jun will.  It might be even worse to get caught by a Lan."

It occurs to him to wonder if Lan Wangji had gone after the Yin Iron today.  If so, how much of what Lan Wangji did had been seen by Wei Wuxian? 

"Where did you and Lan-er gongzi go today?"

"Oh, quite far! First we went to see the beetles again - or at least, I was going to try to find the beetles to show Lan Zhan and so we were by the river. I was standing in the shallow water, and I had just seen a perfect little beetle! But just as I reached for it, slimy hands reached out of the river and grabbed us both!" He mimes enthusiastically along to his story, eyes playfully wide. "Do you know what it was, Nie Huaisang, lurking in the water?"

"I don't know.  Was it some kind of monster?"  Huaisang asks back, appearing engaged with the story.