"Quite. I--imagine the clan elders would be unlikely to approve." 

"Who said anything about asking them?" 

"As a sect leader, I cannot flout the wishes, even presumed wishes, of the rest of the clan's leadership easily." 

He pauses and gazes into the distance for a long moment. 

"...A-Zhan is not a sect leader. And has no reason not to bring you to Mother's grave to pay respects." 

"Ah, okay, I see! That works for me then!" 

"Of course, if I were to learn of any such thing in time to prevent it, I would be obligated to do so." 

"Understood." 

(Sect Leader Nie is definitely not snickering. You can tell by how much effort he's putting into it.)

Meng Yao is not snickering at all! He is busy gazing adoringly at Lan Xichen, the Perfect Man.

Awwww.

"Now that all is settled, shall we move inside where it is safer?"

"Yes, not much point in lingering," Sect Leader Nie says brusquely, and heads back inside just slowly enough to let everyone else come along without having to hurry too much. 

The sentries gawk some at the person who looks like a fierce corpse but, honestly, it helps that she's a beautiful woman who is failing to exhibit any typical fierce corpse behaviors like hissing or attacking people. 

She's very well behaved!

And Meng Yao will kill anyone who finds her presence objectionable!

He sets about arranging accommodations so that Mother can stay in a very nice tent right beside his own. 

After checking to make sure Meng Yao doesn't need his immediate help getting his mother situated or explaining things to People In General, Lan Xichen heads off to explain things to People In Specific, that is to say, A-Zhan and maybe if he's unlucky their uncle. 
 

A-Zhan is available. She is playing the qugin inside her tent.

"A-Zhan. Wei Ying and Meng Yao have returned earlier than expected. They're both fine, but Wei Ying continues to embody the ideals of her sect with startling force." 

"They are both absolutely fine, and there is no chance of Wei Ying suggesting using the shard of Yin Iron in our possession as a weapon again." 

What does that mean?

"...Apparently, Wei Ying discovered that if you are ambushed by Wen soldiers and hide the Yin Iron on a dead body unearthed by their ambush, and then attempt to suppress the Yin Iron when this turns the body into a fierce corpse, you can effectively resurrect the original person." 

The real question is why did she expect anything else would happen if she tried to leave Wei Ying unsupervised for two weeks.

"Will Wei Ying be in trouble?"

"I expect that depends on how the new Sect Leader Jiang reacts. Not from Sect Leader Nie or I, at any rate. Even if we wanted to punish her for what was by all accounts a spur-of-the-moment battlefield misjudgment that ultimately ended with no casualties to our side, it would make things somewhat awkward with Meng Yao given who it was that came back." 

...This is a lot. 

Lan Zhan is glad that Wei Ying is spared repercussions at least for now. She doesn't think Jiang Wanyin would ever hurt Wei Ying, whether or not this greatly angers him. Lan Zhan doesn't know how Sect Leader Jin will eventually react, but he is a coward who stands no chance of overpowering Chifeng-Zun or Brother on this matter. Irrelevant.

"Is Madam Meng alright?"

"Shockingly, yes, it seems so." 

"...mm." How completely unlikely. But fortunate.