This is after The Untamed 36th episode,when Wei Wuxian left to wander the world and be free for once in his entire life like he always wanted.This is also a few months after Wei Wuxian's resurrection in Mo Xuanyu's body.

After Wei Wuxian's leave,some people missed him very much.For example,the Lan juniors missed him deeply.They were used to him going with them on nighthunts,so when someone else assisted them,like another Lan senior or even Lan Wangji,they were not that cheerful as they were when Wei Wuxian was with them.

Precisely,Jingyi missed him so much that he would ask Sizhui if he heard news from Lan Wangji about Wei Wuxian's return.But it was unknown everytime.

Lan Sizhui also missed Wei Wuxian very much and hoped he would return early,but he was very patient and waited.Sizhui knew that ★his father figure★(I mean Wei Wuxian)would return,at least he hoped so.

Jin Ling didn't show it,but he missed his second uncle just as Jiang Cheng missed his martial brother too.

(You're Wei Wuxian and a male in this.)