Lan Zhan looked too old, sometimes, staring into the blinding sun of dawn. He looked like he had gone somewhere Wei Wuxian couldn’t follow, beyond the scope of the horizon. Resentful energy swirled black and terrible at that thought, and Wei Wuxian laughed it to shattering pieces. Lan Zhan had stayed, but that didn’t mean he would forever.

"Zewu-Jun. You once told me about a house surrounded by gentians, where you visited once a month, and how Lan Zhan still waited there, even when the door no longer opened." Xichen feels light-headed. He feels shocked, and angry. He has never told anyone such a thing, but Lan Zhan is giving Xichen a look of utter betrayal. "You told him?" Lan Zhan whispers. "When?" Wei Wuxian takes Lan Zhan's hand. "About twenty years from now." Wei Wuxian starts again from the beginning.

or, Catharsis: The Fic In which Wei Wuxian, shortly after being called into Mo Xuanyu’s body, is further forced into the past, where he proceeds to tumble his way into absolutely nailing a time travel fix-it.

“Thank you, A-Ning,” she ran her fingers through his hair and felt her heart tighten as he gave her a bright smile. What wouldn’t she give for his smile to never disappear? What wouldn’t she bear for his eyes to retain their color? What wouldn’t she do for his heart to keep beating? Wen Qing dies, Wen Qing lives. A second chance to make things right.

After their end, a plea and a wish for things to have been different by Lan Xichen sends Nie Mingjue and Jin GuangYao back in time and gives them a chance to do better. With their knowledge of the 'future' they came from, they have to figure out how to deal with each other.

He can’t get Jin Guangyao’s words out of his head. If he’d only believed in Wei Wuxian, if he’d only been willing to stand up for him, could it all have been avoided?

Nie Mingjue would be the very first to admit that devious plotting was not his strong suit – but if it meant he could make things better, make it so that his brother never had to dirty his hands to avenge him, he would do his best. His best, in this instance, was a forbidden ritual that sent him back in time to before their father had died, before Wen Ruohan's perfidy was revealed, before Meng Yao was twisted by the world's cruelty, before Wei Wuxian was orphaned... Nie Mingjue had a lot to do and very little time in which to do it. Best to get started right away.