Canon div where 16yo LWJ does go to Lotus Pier ("To strengthen...

("To strengthen diplomatic relations," LXC told him as he ushered LWJ down the mountain.)
And everything is going well (if he ignores the humidity and does not, under any circumstance, think of WWX in any state of undress)
Aside from that, LWJ is, though slightly reluctant to admit it, enjoying his summer with WWX.
Then it happens.
LWJ is not expecting anything different when they (WWX, his entourage, and by association, LWJ)
The juniors run away before Madam Yu reaches them. WWX turns to him.
"Lan Zhan, you should go to."
LWJ shakes his head, he was not doing anything wrong. He has nothing to fear.
"Wei Ying!" Madam Yu shouts, a few feet away from them.
"Lan Zhan," WWX hastily mutters under his breath, "go."
"Go where?" Madam Yu asks angrily. "Are you corrupting Lan-er-gongzi? Teaching him to flee like a criminal!"
"Wei Ying! You've always been nothing but trouble, and now you even make me lose face in front of guests!"
She moves fast. There's a flash of purple lighting, and LWJ immediately moves to stand between it and WWX
Zidian his him in the face hard enough he staggers
Behind him, WWX gasps.
LWJ's right cheek throbs painfully. It is likely bleeding, he can feel the slickness of it running down his face, but he ignores it. He ignores everything else as his mind zeroes in a single thought: she was going to hit Wei Ying
The Gusu Lan punishes transgressions, yes. But never like this. LWJ has never heard of an elder striking this furiously at a junior for playing about
Madam Yu's initial shocked expression morphs into that of one who knows they have made a grave mistake.
"Lan-er-gongzi."
"The Gusu Lan," LWJ tells her calmly, "demands reparation for this offense."
"Name your terms," Madam Yu asks.
"A marriage alliance."
"Lan Wangji asks for Wei Wuxian's hand in marriage, to restore and strengthen the bonds between the Gusu Lan and the Yunmeng Jiang."
"The Yunmeng Jiang accepts." She likely does not hold this kind of power either, but again, once something is said...
Madam Yu does not sneer, but it's a near thing. "As you wish."
Once they're alone, he turns to find WWX blinking in confusion at him.
"Lan Zhan, what did you do?"
"Why do you want to marry me? You don't even like me."
"I do."
"What?"
LWJ's heart is beating hard. His face feels hot but somehow he doesn't think it is because of the wound.
WWX blinks at him again. His face now red.
"This is not a safe place for you," LWJ tells him.
"But... how can I leave Shijie, and Jiang Cheng, and... and everyone else."
"So you don't really wanna marry me."
"I do. But if Wei Ying does not--"
"What does that mean? Being married."
"I believe it means we stay together, and take care of each other."
WWX's lost in thought for a moment, then he nods. "Yeah, I think you're right"
"Wei Ying, even if you marry me, you may still come back here whenever you want. The Cloud Recesses is not a prison."
Then, at last, he turns to LWJ with a bright smile.
"Lan Zhan," he calls happily. "You're really great. I like you a lot."
"Say, Lan Zhan," WWX's smile turns teasing. "Once we're married, are you gonna kiss me?"
"Mn," LWJ agrees promptly. "I shall fulfill all my husbandly duties."
WWX gasps, then sets off on a laugh.
--
And they lived happily ever after, nothing bad happened again, the end.